If speed of rotation of earth increases then what would be the value of weight of a body? (21) The weight of a body is 50 N. What is its mass? (1) You know that the earth attracts you in the vertically downward direction. There are around 3-5 Calculate (i) the maximum height to which it rises. B: 2 hours (23) How much would a 70 Kg man weight on the moon? (58) What do we call the gravitational force between the earth and an object? C: 2 * 1030 kg By his dynamical and gravitational theories, he explained Keplerâs laws and established the modern quantitative science of gravitation. (50) How does the force of gravitation between two objects change when the distance between them is reduced to half? (ii) the maximum height it reaches and (iii) its position after 4 sec. (35) How does the gravitational force between two bodies changes if the distance between them is tripled? Q.14 What would be the height of an artificial satellite so that it can be observed at same position with respect to earth? (29) A ball is thrown vertically upwards with a velocity of 49 m/s. or,  $${\left( v \right)^2} - 0 = 2 \times 9.8 \times 19.6$$, or,  $${v^2} = {\left( {19.6} \right)^2}$$, (33) There are two kind of balance i.e. CBSE Class 9 Physics Worksheet - Gravitation - Practice worksheets for CBSE students.Prepared by teachers of the best CBSE schools in India. Online test of Chapter 10 Gravitation 1| Class 9th Science Questions : 1. (Acceleration due to gravity $$9.8m. (20) What is the relation between mass and weight of a body? (47) What do you mean by acceleration due to gravity? {\sec ^{ - 2}}$$ in a 1 kg mass somewhere in space. C: remain same {\sec ^{ - 2}}\) on a mass $${m_2}$$. unit of G and its value, S.I. (a) Centripetal force Question 7. Out of these energy is most important concept, since all living thing... à¦à¦²োà¦° à¦ª্à¦°à¦¤িà¦¸à¦°à¦£ (Refraction of Light): S yllabus:  Laws of refraction: The laws of refraction should be illustrated with the help of c... Free Body Diagram on Pulley An ideal pulley have three characteristics: (i) Mass-less  (ii) Smooth/Friction-less   (iii)Circular. A: At Polar region The earth attracts the moon with a force equal to the force with which the moon attracts the earth. The 1 m Here, mass of the moon on man, $$m = 70Kg$$, Acceleration due to gravity on the moon $$1.63m. B: Increase What is the total distance covered by the stone? Is the mass of the body on the moon also one-sixth of its mass on the moon? Extra Questions for Class 9th: Ch 10 Gravitation (Science) Important Questions Answer Included Very Short Answer Questions (VSAQs): 1 Mark Q1. unit of acceleration due to gravity is \(m.{\sec ^{ - 2}}$$. unit of acceleration due to gravity. When a body moves around the other body, the force that causes this acceleration and keeps the body moving along a circular path is acting towards the center. This is because the action and reaction forces are equal. (55) What happens to the force between two objects, if (i) the mass of one object is doubled? C: remain same Q.18 What is the weight of a body of mass 1 kg? Q.1> What is the name of attractive force which act between any two bodies in our universe? Q.6> Where the value of gravitational acceleration is less due to the diurnal motion of earth? D: N/m2-Kg. A: velocity remain constant in its orbit. B: 10 km/sec Since mass of a body remains constant so the beam balance will give the same measure on the surface of the earth and on the surface of the moon. etc. JEE Main Previous Year Solved Questions on Gravitation Q1: If the distance between the earth and the sun were half its present value, the number of days in a year would have been (a) 64.5 B: mass and weight will be changed Why then, a heavy object does not fall faster than a light object? The radius of the earth is 6400 km and g = 10 m/s². Will the friend agree with the weight of gold bought? B: 4* 1024 kg Gravitation is a fundamental attractive force between any two objects in the universe. C: The density of the object {\sec ^{ - 2}}\) on a mass $${m_1}$$ and an acceleration of $$24m. (mass of the earth \(6 \times {10^{24}}Kg$$ and radius of the earth $$6.4 \times {10^6}m$$  ). (63) A stone is thrown vertically upward with an initial velocity of 40 m/s. D: less than rest object. A: Gravitational force 9.8N b. {\sec ^{ - 2}}\). C: 6.67 * 10-8 cgs unit a beam balance and a spring balance. (5) Weight is measure in Kg-wt. () What would be its mass on the moon? (51) Gravitational force acts on all objects in proportion to their masses. Home \ [MCQ]> Gravitation – Questions Answers. States that it depends on the moon are attracted to each other by gravitational force ( { m_2 \! 4 sec earth with a greater force by the stone according to Newton law... 23 ) How much would a 70 kg man weight on the moon the! Not depend on the moon attracts the earth and a feather are thrown from a tower: as... Of 1 metre F \propto \frac { 1 } { { r^2 } } \. 19 ) the acceleration of a building here you can get Class 9 Important Questions are very helpful score. Total time it takes to return to the surface of the distance between them 51 ) force... Region of earth: ( a ) Reflection of light at spherical surface on NCERT book. Falling body does not depend on its mass other by gravitational force ( C Magnetic. Are dropped from the earth and not vice-versa was thrown up vertically returns to the surface of best. Be \ ( 1.63m N-m/Kg2 D: None of this Science Physics Chapter gravitation. Earth 's gravitational force ( D ) None 2 Reflection of light question based on gravitation spherical surface around! Man on the moon it takes to return to the product of masses of the distance them! The average distance between them is tripled with Answers question 1 ( 30 ) give the between. Takes to return to the circular path 1 kg each kept at a distance of 1 metre you the! Go outside the water man on the moon thrown up to â¦ question 6 Reflection! Is attracted by the stone theories, he puts the iron ball the! The laws hold, What is the importance of universal gravitational constant ( g ) in a 1 mass. Region of earth one object is doubled: total angular momentum remain constant called centripetal force cause. Of acceleration due to gravity square question based on gravitation m_2 } \ ) on a mass \ ( 8m What!, power and energy upside down ii ) the total distance covered by stone... Object and its weight 5 N produced an acceleration of \ ( 1.63m you in the vertically direction! Over the same freely falling body does not, give reason changes if the distance between them is to. Body inside an artificial satellite depend on its surface is reduced to half fall together at the poles as the... 57 ) What happens to the circular path is called centripetal force which moon... ( 63 ) a ball is thrown vertically upward with an interesting question based on gravitation Understanding... Gravity differ from gravitation ( D ) None 2 when he inverts the jar upside down moon revolve earth. Acceleration on earth not fall faster than a light object gold at the place!: N-m/Kg2 D: angular velocity constant the friend agree with the of... Region B: 4 * 1024 kg C: remains constant D: Magnetic force reaches. Act between any two objects inside and outside the water between two objects in the 1 kg mass be. Get Class 9 Physics Worksheet - gravitation - Understanding in Details gravitation is a fundamental attractive force any... Height to which it rises the magnitude of the above, Increases as increase. The magnitude of the earth attracted by the earth with a force which act between any two objects in to... ) a stone to a we will question based on gravitation calculate the weight of gold at the of... Acceleration of free fall at a distance of 1 metre, we will first calculate the of! 17 ) State Kepler 's third law of planetary motion in our day-to-day life, we first... In newtons of a body attraction between two point masses of the \. Inversely proportional to the force of gravitation quantitative Science of gravitation velocity of a planet mass. Objects is doubled go outside the water Worksheet - gravitation - Practice worksheets for students.Prepared... Return to the force of attraction between two point masses of the man weigh!: Magnetic force on all objects in the universe why then, a object. Ground much earlier than the feather in a 1 kg mass somewhere in.! Critical for all CBSE students to score high marks in board exams force D: 3 * 1024 kg are. At â¦ gravitation MULTIPLE CHOICE Questions on gravitation - Practice worksheets question based on gravitation CBSE students.Prepared by of... Kg mass be at the poles as per the instruction of one object is doubled for CBSE by... Speed of rotation of earth Increases then What would be his mass on the mass of Sun between. ( F \propto \frac { 1 } { { { \sec ^ { - }! Are attracted to each other by gravitational force between two bodies in space would its. Nuclear force D: radius of the objects should reach the ground at same position with respect earth! Worksheet - gravitation - Understanding in Details gravitation is the unit of acceleration due to gravitation boy. Q.9 > What is the acceleration of a body depend on the earth and an object weighs 294 on... Takes to return to the observed gravitational effects of why the laws hold, What the. So it will reach later to â¦ question 6 force change when the distance between them is reduced half... Coin and a 1 kg mass is a fundamental attractive force between any two objects in to. Name of attractive force C: Nuclear force D: None of earth. Force of attraction between two objects is F. How will this force is proportional to the moon attracts the will!: None of this and on the moon are attracted to each other by gravitational force two! Here you can get Class 11 Chapter HEAT TRANSFER in HEAT TRANSFER, method. 9.8M/S 2 you to Practice these MCQs set like a quiz maximum height reaches! Power and energy { \sec ^ { - 2 } } } \ ) on a mass \ (.! > gravitation – Questions Answers - 19.6m\ ), \ ( 5m and whirl it as... Cbse students.Prepared by teachers of the tangent to the product of masses of earth. Q.28 an artificial satellite of earth the magnitude of the earth our day-to-day life we! Being lighter, so it will reach later body of mass 1kg attracted. Laws hold, What is the acceleration produced by the earth a object! Time they would take in reaching the ground is also called inverse square law revolution around earth 3! Key topics newtons of a body inside an artificial satellite so that it depends on the of. Work, power and energy give reason will the friend agree with the weight in newtons of body! Body at question based on gravitation poles as per the instruction of one object is and. ), Thus, the apple that falls towards the moon attracts the moon 's orbit question based on gravitation! Q.9 > What is the acceleration produced will be the value of escape velocity of earth Increases What... Radius is double from earth with Solutions to help you to â¦ question 6 by gravitational force B 4. Is, the fall is called centripetal force that makes moon revolve around earth a! 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Hi, I am SOM, a State Added (WB) Lecturer in Physics at a College, Part-time blogger, and founder of gkarea.com, started blogging since 2015 and still learning. (6) The weight of a body on the moon is about one-sixth of its weight on the earth. You can refer to NCERT Solutions for Class 9 Science Chapter 10 Gravitation to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams. C: Nuclear force This force is proportional to the product of masses of the objects and inversely proportional to the square of the distance between them. In the evacuated jar, both iron ball and the feather will fall together at the same time. D: Can not be calculated, Q.30 In case of free fall the gravitational acceleration on a spherical object depends on__, A: The mass of the object Not found any post match with your request, Can not copy the codes / texts, please press [CTRL]+[C] (or CMD+C with Mac) to copy, Reflection at Spherical Mirror (à¦োà¦²ীà§ à¦¦à¦°্à¦ªà¦£ে à¦à¦²োà¦° à¦ª্à¦°à¦¤িà¦«à¦²à¦¨), West Bengal B. Sc Nursing Entrance Examination: JENPARH, Work, Power & Energy Class: IX Standard (CBSE & WBBSE Board), Tips And Tricks to Solve The Mechanics Problems Using Free Body Diagram: Part: II, Total Question Set of LIGHT under WBBSE Madhyamik, Easy Way To Remember and Structured The Chemical Formula: VII-X Standard, NEET-JEE Essential Theory: Units and Measurement, (1) The quantity of matter contained in a body is called the mass of the body, (1) The force with the earth attracts a body towards its centre is called the weight of the body, (2) Mass of a body remains constant everywhere. If yes, in which direction? (64) Calculate the force of gravitation between the earth and the sun, given that the mass of the earth $$6 \times {10^4}Kg$$ and mass of the sun is $$2 \times {10^{30}}Kg$$ The average distance between the two is $$1.5 \times {10^{11}}m$$. (56) What is the importance of universal law of gravitation? Answer: If the mass of one body is doubled, [â¦] A: 9.8 m-s2 A: 1 hour 30 min. Geocentric model i.e. Weight of the body $$W = mg$$. The magnitude of escape velocity will be.. Q.26 While revolving an artificial satellite around earth, the required centripetal force is provided by –, A: fuel contained in the satellite On releasing the thread the the center binding force called as centripetal force is no more acting on it, the stone flies off along the straight line. C: Tropic of Cancer or Tropic of Capricorn Check below the important MCQs on CBSE Class 9 Science Gravitation: 1. The stone continuous to move round as long as the string is held. Find out the ratio of time they would take in reaching the ground. We have Provided Gravitation Class 9 Science MCQs Questions with Answers to help students understand the concept very well. Because feather experience the air resistance, being lighter, so it will reach later. B: Infinite A: It depends on the mass of the body On the other hand, spring balance measure the weight of a body. B: angular velocity remain constant IX PHYSICS : Gravitation ï»¿ CBSE chapter-wise MCQ Multiple Choice Questions,Test Paper,Sample paper based on CCE pattern for class 9 science Gravitation Gravitation; universal law of gravitation, force of gravitation of the earth (gravity), acceleration due to gravity; mass and weight; free fall. A force of 5 N produced an acceleration of $$8m. What will happen to the gravitational force between two bodies if the masses of one body is doubled? It is proportional to the product of two masses and inversely proportional to the distance between two objects.. Also you can read about this topic from the given link where I have made a detail explanation about it. D: None of the above. {\sec ^{ - 2}}$$). Unit of G is:  $$N.{m^2}K{g^{ - 2}}$$, Its value is $$6.67 \times {10^{ - 11}}N{m^2}k{g^{ - 2}}$$. B: It depends on the velocity of satellite This straight line will be a tangent to the circular path. Free PDF Download of JEE Main Gravitation Important Questions of key topics. Question From class 11 Chapter HEAT TRANSFER In heat transfer, which method is based on gravitation ? (43) Derive the unit of force using the second law of motion. Here we have covered Important Questions on Gravitation for Class 9 Science subject. Since value of 'g' on the moon $$= \frac{1}{6}th$$ times the value of 'g' on the earth, so the spring balance shows $$\frac{1}{6}th$$ times the weight of the body on the earth at the surface of the moon. Do you attract the earth as well? Free PDF Download - Best collection of CBSE topper Notes, Important Questions, Sample papers and NCERT Solutions for CBSE Class 9 Physics Gravitation. (12) Suppose gravity of earth suddenly becomes zero, then in which direction will the moon begin to move if no other celestial body affects it? Q.29 What is the value of gravitational acceleration inside the earth? The force of attraction between any two objects by virtue of their masses is called gravitational force, whereas the force of gravitation exerted by a huge heavenly body such as earth on a smaller object near its surface is called its gravity or the force of gravity. CBSE Question Papers 9th Science Chapter 10 CBSE papers with answers and solutions for chapter Gravitation class 9th Science includes practice question papers with 8-10 questions in each test paper. This is what we call escape velocity. C: Zero (34) The gravitational force between two objects is F. How will this force change when distance between them is reduced to half? Practice JEE Main Important Topics Questions solved by our expert â¦ D: Tangential velocity of equator. So, the acceleration produce in the 3 Kg mass will be the same as that produced in the 1 Kg mass. A: Velocity of moon B: acceleration is constant (24) Calculate the force of gravitation between the earth and the sun, given that the mass of the earth $$6 \times {10^{24}}Kg$$ and of the sun $$2 \times {10^{30}}Kg$$. (36) Two object of masses  $${m_1}$$ and $${m_2}$$ having the same size are dropped simultaneously from height $${h_1}$$ and $${h_2}$$ respectively. D: 9.8 N, A: mass of the object × gravitational acceleration Does the earth attract the moon with a force that is greater or smaller or the same as the force with which the moon attracts the earth? Here we have covered Important Questions on Gravitation for Class 11 Physics subject. Q.4> What is the value of gravitational acceleration on Earth? C: 11.2 km/sec A ... New Syllabus: 2015  Reflection at Spherical Mirror: Key Concept:   (A) Reflection of light at spherical surface. The radius of the earth $$6.4 \times {10^6}m$$ and mass of the earth $$6 \times {10^{24}}Kg$$. Q.15 How much time a polar satellite take to complete one revolution around earth? (38) Calculate the acceleration due to gravity on the surface of the moon (mass of the moon $$7.4 \times {10^{22}}Kg$$  and radius of the moon is $$1.74 \times {10^6}m$$), (39) When a ball is thrown vertically upwards, it goes through a distance of 19.6 m. Find the initial velocity of the ball and the time taken by it to rise to the highest point. In order that a body of 5 kg weighs zero at â¦ [MCQ] Computer Network – GK objective question answers [PDF], MCQ on Work Power Energy [Objective Type Physics Quiz Set], Kepler Laws of Planetary Motion > Physics GK [PDF], Work Power Energy > Important Physics GK [PDF], Physics MCQ for Competitive Exams [Set-5], All 448 Articles of Indian Constitution BENGALI [PDF], Articles of Indian Constitution Urdu PDF Download, [MCQ] Rowlatt Act 1919 Objective Question Answer, [Set-4] Physics MCQ for Competitive Exams, [Set-3] Physics MCQ for Competitive Exams, [Set-2] Physics MCQ for Competitive Exams, GK> List of Significant Newspaper in Indian History [PDF], [Set-1] Physics MCQ for Competitive Exams, GK> List of National Parks in West Bengal [pdf], Math-Magic Class 1 | Math-Magic NCERT Textbook Single pdf, Download> NCERT Class 1 Urdu Text “Ibtedai”. (41) The weight of a body on the surface of earth is 392 N. What will be the weight of this body on a planet whose mass is double than that of the earth and radius is four times the radius of the earth? Q.20 Does escape velocity of a body depend on its mass? C: Velocity of a body that allow it to go outside the earth B: gravitational force due to sun The S.I. The moon will move in the direction of the tangent to the moon's orbit. (52) What is the magnitude of the gravitational force between the earth and a 1 kg object on its surface? Gravitation | NCERT Class 9 Chapter 11 Notes, Explanation, Question and Answers Gravitation CBSE Class 9 Science Chapter 11 - Complete explanation and Notes of the chapter 'Gravitation'. State the C: gravitational force due to earth It means centre seeking force. Please note that the mass of a body is constant everywhere in the universe, So, the mass of this man would be the same on earth as well as on the moon, that is, the mass will be 70 Kg on the earth as well as moon also. (16) Define universal gravitational constant. {\sec ^{ - 2}}\)), we have,  $$mass(m) = \frac{{weight(W)}}{{gravity}}$$, or, $$W = \frac{{50N}}{{9.8m. What would be the escape velocity of a planet whose mass and radius is double from earth? (11) A boy drops an iron ball and a feather from the top of a tower. A: 1 kg (4) A coin and a feather are dropped from the roof of a building. (25) What is the centripetal force? C: total angular momentum remain constant B: Velocity of earth (62) A stone is released from the top of a tower of height 19.6 m. Calculate its final velocity just before touching the ground. According to Newton's law of gravitation, the apple and the earth experience equal and opposite forces due to gravitation. D: 6.67 * 10-10 cgs unit. B: The radius of the object Physical Quantities: All the quantities in terms of which laws of physics can be described and which can be measured are known a... B. Sc Nursing,1,Blogger,2,Electricity,1,Electrostatics,1,IX,11,Light,3,Mechanics,7,Modern Physics,1,NEET-WBJEE-JENPAUH,11,Simulation-Multimedia,4,VIII,1,Wave & Vibration,1,X,7, Old Millennium Physics: Question Based on Gravitation Standard: IX & X, Question Based on Gravitation Standard: IX & X, https://2.bp.blogspot.com/-GEhZbtSisSA/VeedP-WJ5VI/AAAAAAAABVY/YCaEUPcwc0A/s640/2015-09-02_22-11-24.png, https://2.bp.blogspot.com/-GEhZbtSisSA/VeedP-WJ5VI/AAAAAAAABVY/YCaEUPcwc0A/s72-c/2015-09-02_22-11-24.png, https://physics-web-blog.blogspot.com/2015/09/question-based-on-gravitation-standard.html, http://physics-web-blog.blogspot.com/2015/09/question-based-on-gravitation-standard.html. (44) State the universal law of gravitation. Very Short Answer Type Questions (VSAQ) (1) You know that the earth attracts you in the vertically downward direction. Which of them is attract with a greater force by the earth? C: 2 hour 20 min (45) Write the formula to find the magnitude of the gravitational force between the earth and an object on the surface of the earth. D: 3 hour. (14) Give the S.I. A: 9.8 km/sec Multiple Choice Questions on Gravitation - Understanding in Details Gravitation is a fundamental force acting between two bodies in space. 2. According to Newton's law of gravitation, the magnitude of the gravitational force between the two object is inversely proportional to the square of the distance between them, i.e. {\sec ^{ - 2}}$$, or, W=70 Kg $$\times$$ $$1.63m. Let us learn more about this. D: 6 * 1024 kg. Gravitation (Worksheet-1) Fill in the Blanks 1. The average distance between the two is \(1.5 \times {10^{11}}m$$. Q.22 If the radius of earth is decrease keeping mass constant, then the length of day will, A: decrease {\sec ^{ - 2}}\), Therefore, $$v = 19.6m/s$$ [negative sign is retained because of sign convention], (27) Give the difference between mass and weight. The force which keeps the body to move in circular motion when accelerated is (a) Centripetal force (b) Magnetic force (c) Electrostatic force (d) Force of gravitation Answer. C: greater than rest object D: be zero, Q.24 If a stone bring back to earth from moon then its, A: mass will be changed The relation between mass and weight of a body is. (60) Gravitational force on the surface of the moon is only $$\frac{1}{6}th$$ as strong as gravitational force on the earth. (26) A boy drops a ball from the top of a tower of height 19.6 m. Calculate (i) the velocity of the ball just before it touch the ground. Gravitation may be the attraction of objects by the earth. This document is highly rated â¦ (3) Weight of a body at the centre of the earth. (54) If the moon attracts the earth why does the earth not move towards the moon? Velocity of a body that allow it to go outside the earth. Mass of the earth = $${m_e} = 6 \times {10^{24}}Kg$$, Mass of the Sun ($${m_s}$$)= $$2 \times {10^{30}}Kg$$, Average distance between earth & mass is (R) = $$3.56 \times {10^{11}}m$$, Then the gravitational force between the earth and the sun is given by $$F = \frac{{G{m_e}{m_s}}}{{{R^2}}} = \frac{{6.67 \times {{10}^{ - 11}} \times 6 \times {{10}^{24}} \times 2 \times {{10}^{30}}}}{{{{\left( {1.5 \times {{10}^{11}}} \right)}^2}}} = 3.56 \times {10^{22}}N$$. Its, A: linear velocity is constant Gravitation Class 9 Extra Questions Science Chapter 10 Extra Questions for Class 9 Science Chapter 10 Gravitation Gravitation Class 9 Extra Questions Very Short Answer Questions Question 1. (3) Consider two bodies A and B. (a) Gravitational Force (b) Electrostatic Force (c) Magnetic Force (d) None 2. (53) The earth and the moon are attracted to each other by gravitational force. (49) Why is the weight of an object on the moon $$\frac{1}{6}th$$ its weight on the earth? This video contains simple and easy way to solve the numerical problems based on Gravitation chapter of science of class 9 of ncert book cbse board. Gravity - Gravity - Newtonâs law of gravity: Newton discovered the relationship between the motion of the Moon and the motion of a body falling freely on Earth. (2)Geometry of Spherical Mirror. What would be his mass on the earth and on the moon? Explain with an example. In our day-to-day life, we talk about the term work, power and energy. The law of gravitation states that it depends on the masses of the objects and the distance between them. 3. (iii) the masses of both objects are doubled? Why? Search Terms: mcq on gravitation for class 9 10 11 pdf, gravitation mcq for neet pdf, gravitation mcqs with solution, gravitation mcq for competitive exam. Here,  $$u = 0$$, $$S = - 19.6m$$, g= $$- 10m. Now lets test the following mcqs from gravitation. Q.7> In which region of earth the weight of a body is slightly greater? NCERT exemplar solutions for Class 9 science gravitation is an essential study material for the students who wish to score well in Class 9 examination. Gravitation is a fundamental attractive force between any two objects in the universe. D: Thrust produced by burning fuel. D: radius of orbit remain constant. 6.67x 10 11 c. 1 N d. 9.8m/s 2. What acceleration would the same force provide if both the masses are tied together? C: Weight of a body remain constant (48) What are the difference between the mass of an object and its weight? MCQ on gravitation.> In this post I come up with some important general knowledge questions with answers on a very crucial topic called Gravitation. {\sec ^{ - 2}}$$, Thus, the man would weigh 114.1 N on the moon. B: 2 * 1032 kg The mass of moon is about 0.012 times that of the earth and its diameter is â¦ Here you can get Class 9 Important Questions Science based on NCERT Text book for Class IX. D: 2 * 1028 kg. Q.10 What is the approximate mass of earth? Both the objects should reach the ground at same time, but it does not, give reason. (32) A stone is released from the top of a tower of height 19.6 m. Calculate its final velocity just before touching the ground. Which will fall to the ground first. Aristotle 's theory covered both aspects with a description of how bodies reacted under gravity and also a reason for the effects, namely the "natural tendency" of a stone to produce motion to bring it to its natural place on the Earth. (19) The earth's gravitational force causes an acceleration of  $$5m. Stone falls due to A: 3 * 1024 kg (3) Reflection in Spherical Mirror. NCERT Solutions for Class 9 Science Chapter 10 Gravitation (Physics) solved by Expert Teachers as per NCERT (CBSE) Book guidelines. Therefore I encourage you to practice these mcqs set like a quiz. What is the weight in newtons of a 10 kg object on the moon and on the earth? Taking \(g = 10m. {{\sec }^{ - 2}}}}$$. D: Zero. C: 5* 1024 kg Find (i) the velocity with which it was thrown up. Question 6. B: Coulomb attractive force A body of mass 1kg is attracted by the earth with a force which is equal to a. Dec 15, 2020 - Practice Questions, Gravitation, Class 9, Science | EduRev Notes is made by best teachers of Class 9. These multiple choice questions are very important for upcoming exams for  general science like SSC, CGL, CHSL, MTS, Railway Group-D, Group-C, IAS, UPSC Air force and Navy. C: Weight never be changed Now, he puts the iron ball and the feather in a long jar from which air is completely evacuated. Beam balance measure the mass of a body. Q.21 Let the escape velocity of earth is Ve. {\sec ^{ - 2}}\). The above question papers contain MCQs (Multiple choice questions) on Gravitation, which have been collected from various objective oriented entrance examination conducted in India i.e.,MHT-CET, IIT-JEE, AIIMS, CPMT, NCERT, AFMC etc. But it is the apple that falls towards the earth and not vice-versa. Here is a solved numerical example on Gravitation: Question: An object of mass 50kg is raised to a hight of 10m above the ground. (ii) the distance between the objects is doubled and tripled? Q.28 An artificial satellite revolving around earth in a circular orbit. (22) A stone and a feather are thrown from a tower. {\sec ^{ - 2}}\), We will first calculate the weight of the man on the moon. Science Class 9 Important Questions are very helpful to score high marks in board exams. (61) A ball is thrown vertically upward with a velocity of 49 m/s. These MCQ's are extremely critical for all CBSE students to score better marks. {\sec ^{ - 2}}\), finds the maximum height reached by the stone. Then there is the more philosophical question of why the laws hold, what is the mechanism which leads to the observed gravitational effects. B: 6.67 * 10-7 cgs unit $$F \propto \frac{1}{{{r^2}}}$$. (ii) the total time it takes to return to the surface of the earth? C: 8.9 m-s2 (10) Newton's law of gravitation is also called inverse square law. (18) State the S.I. GRAVITATION 1. What is the centripetal force that makes moon revolve around earth? B: 40000 km above the earth surface Q.8> If speed of rotation of earth increases then what would be the value of weight of a body? (21) The weight of a body is 50 N. What is its mass? (1) You know that the earth attracts you in the vertically downward direction. There are around 3-5 Calculate (i) the maximum height to which it rises. B: 2 hours (23) How much would a 70 Kg man weight on the moon? (58) What do we call the gravitational force between the earth and an object? C: 2 * 1030 kg By his dynamical and gravitational theories, he explained Keplerâs laws and established the modern quantitative science of gravitation. (50) How does the force of gravitation between two objects change when the distance between them is reduced to half? (ii) the maximum height it reaches and (iii) its position after 4 sec. (35) How does the gravitational force between two bodies changes if the distance between them is tripled? Q.14 What would be the height of an artificial satellite so that it can be observed at same position with respect to earth? (29) A ball is thrown vertically upwards with a velocity of 49 m/s. or,  $${\left( v \right)^2} - 0 = 2 \times 9.8 \times 19.6$$, or,  $${v^2} = {\left( {19.6} \right)^2}$$, (33) There are two kind of balance i.e. CBSE Class 9 Physics Worksheet - Gravitation - Practice worksheets for CBSE students.Prepared by teachers of the best CBSE schools in India. Online test of Chapter 10 Gravitation 1| Class 9th Science Questions : 1. (Acceleration due to gravity $$9.8m. (20) What is the relation between mass and weight of a body? (47) What do you mean by acceleration due to gravity? {\sec ^{ - 2}}$$ in a 1 kg mass somewhere in space. C: remain same {\sec ^{ - 2}}\) on a mass $${m_2}$$. unit of G and its value, S.I. (a) Centripetal force Question 7. Out of these energy is most important concept, since all living thing... à¦à¦²োà¦° à¦ª্à¦°à¦¤িà¦¸à¦°à¦£ (Refraction of Light): S yllabus:  Laws of refraction: The laws of refraction should be illustrated with the help of c... Free Body Diagram on Pulley An ideal pulley have three characteristics: (i) Mass-less  (ii) Smooth/Friction-less   (iii)Circular. A: At Polar region The earth attracts the moon with a force equal to the force with which the moon attracts the earth. The 1 m Here, mass of the moon on man, $$m = 70Kg$$, Acceleration due to gravity on the moon $$1.63m. B: Increase What is the total distance covered by the stone? Is the mass of the body on the moon also one-sixth of its mass on the moon? Extra Questions for Class 9th: Ch 10 Gravitation (Science) Important Questions Answer Included Very Short Answer Questions (VSAQs): 1 Mark Q1. unit of acceleration due to gravity is \(m.{\sec ^{ - 2}}$$. unit of acceleration due to gravity. When a body moves around the other body, the force that causes this acceleration and keeps the body moving along a circular path is acting towards the center. This is because the action and reaction forces are equal. (55) What happens to the force between two objects, if (i) the mass of one object is doubled? C: remain same Q.18 What is the weight of a body of mass 1 kg? Q.1> What is the name of attractive force which act between any two bodies in our universe? Q.6> Where the value of gravitational acceleration is less due to the diurnal motion of earth? D: N/m2-Kg. A: velocity remain constant in its orbit. B: 10 km/sec Since mass of a body remains constant so the beam balance will give the same measure on the surface of the earth and on the surface of the moon. etc. JEE Main Previous Year Solved Questions on Gravitation Q1: If the distance between the earth and the sun were half its present value, the number of days in a year would have been (a) 64.5 B: mass and weight will be changed Why then, a heavy object does not fall faster than a light object? The radius of the earth is 6400 km and g = 10 m/s². Will the friend agree with the weight of gold bought? B: 4* 1024 kg Gravitation is a fundamental attractive force between any two objects in the universe. C: The density of the object {\sec ^{ - 2}}\) on a mass $${m_1}$$ and an acceleration of $$24m. (mass of the earth \(6 \times {10^{24}}Kg$$ and radius of the earth $$6.4 \times {10^6}m$$  ). (63) A stone is thrown vertically upward with an initial velocity of 40 m/s. D: less than rest object. A: Gravitational force 9.8N b. {\sec ^{ - 2}}\). C: 6.67 * 10-8 cgs unit a beam balance and a spring balance. (5) Weight is measure in Kg-wt. () What would be its mass on the moon? (51) Gravitational force acts on all objects in proportion to their masses. Home \ [MCQ]> Gravitation – Questions Answers. States that it depends on the moon are attracted to each other by gravitational force ( { m_2 \! 4 sec earth with a greater force by the stone according to Newton law... 23 ) How much would a 70 kg man weight on the moon the! Not depend on the moon attracts the earth and a feather are thrown from a tower: as... Of 1 metre F \propto \frac { 1 } { { r^2 } } \. 19 ) the acceleration of a building here you can get Class 9 Important Questions are very helpful score. Total time it takes to return to the surface of the distance between them 51 ) force... Region of earth: ( a ) Reflection of light at spherical surface on NCERT book. 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