This quiz works best with JavaScript enabled. Home > Cbse > Class 9 > Science > Gravitation > Class 9 Science Chapter 10 Gravitation – Quiz 2 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 9 Science Chapter 10 Gravitation Quiz 2 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Why do we weight less on moon as compared to earth? A) Because moon has less mass compared to earth. B) Because is space our weight is reduced. C) Because moon weight less. D) Because moons gravitational force is less. Show Answer Correct Answer: A) Because moon has less mass compared to earth. 2. The force of gravitation between two object varies with ' r' A) 1/r$^{2}$. B) 1/r. C) R. D) R$^{2}$. Show Answer Correct Answer: A) 1/r$^{2}$. 3. The weight of an object at the center of the Earth of Radius R is:The center of an earth, which is R, will be loaded with an object in the center: A) Zero/zero. B) Infinite/infinite. C) R times the weight at the surface of the earth/Row on the surface of the earth. D) None of the above/None of these. Show Answer Correct Answer: A) Zero/zero. 4. Kepler's 2nd Law deals with A) The shape of the planets' orbits. B) The speed/area the planet travels. C) The length of time it takes the planet to orbit the sun. D) None of the above. Show Answer Correct Answer: B) The speed/area the planet travels. 5. The moon and other satellites rotate around the earth. Identify the force that keeps these satellites in orbit. A) Electromagnetic force. B) Friction. C) A strong force. D) Gravity. Show Answer Correct Answer: D) Gravity. 6. Mass is a ..... quantity. A) Vector. B) Scalar. C) All the above. D) None of the above. Show Answer Correct Answer: B) Scalar. 7. The gravitational force between two bodies of masses m1 and m2 separated by distance r is F. State the effect on the gravitational force when m1 increases twice. A) Fly. B) 4F. C) 4F. D) 1/2 F. Show Answer Correct Answer: A) Fly. 8. A satellite of the earth is revolving in a circular orbit with a uniform speed v. If the gravitational force suddenly disappears, the satellite will A) Continue to move with velocity v along the original orbit. B) Move with a velocity v, tangentially to the original orbit. C) Fall down with increasing velocity. D) Ultimately come to rest somewhere on the original orbit. Show Answer Correct Answer: B) Move with a velocity v, tangentially to the original orbit. 9. Where is ULG (universal law of gravitation) not used A) Trajectory. B) Charges. C) Satellites. D) Tides. Show Answer Correct Answer: B) Charges. 10. If the distance between two objects is doubled, how does the gravitational force between them change? A) It doubles. B) It becomes half as strong. C) It remains the same. D) It becomes one-fourth as strong. Show Answer Correct Answer: D) It becomes one-fourth as strong. 11. Which off the following statement is correct about acceleration due to gravity A) Value of g varies from place to place. B) G is more at equator than at pole. C) G is equal at equator and pole. D) G is less at the equator than at the pole. Show Answer Correct Answer: D) G is less at the equator than at the pole. 12. The acceleration due to gravity on the Earth depends upon the A) Mass of the body. B) Mass of the Earth. C) Shape and size of the body. D) Volume of the body. Show Answer Correct Answer: B) Mass of the Earth. 13. Two objects of different masses falling freely near the surface of the moon would A) Have different acceleration. B) Undergo a change in their inertia. C) Have same velocities at any instant. D) Experience forces of same magnitude. Show Answer Correct Answer: C) Have same velocities at any instant. 14. The weight of an object on the Moon's surface is A) 1/5 $^{rd}$ of the weight on Earth. B) 1/2 $^{nd}$ of the weight on Earth. C) 1/3 $^{rd}$ of the weight on Earth. D) 1/6$^{th}$ of the weight on Earth. Show Answer Correct Answer: D) 1/6$^{th}$ of the weight on Earth. 15. The value of ' g ' is maximum at A) Equator. B) Below the earth surface. C) Pole. D) None of these. Show Answer Correct Answer: C) Pole. 16. Gravitational force obeys inverse square law. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 17. Which is a correct statement about mass? A) Mass can be zero. B) Mass is derived quantity. C) Mass is constant everywhere. D) Mass is vector quantity. Show Answer Correct Answer: C) Mass is constant everywhere. 18. Where it will be profitable to purchase one kilogram of apples? A) At 45$^\circ$Latitudes. B) At Equator. C) At 60$^\circ$ Latitudes. D) At poles. Show Answer Correct Answer: B) At Equator. 19. If the mass of Earth increased, with no change in radius, your weight would ..... A) Increase also. B) Stay the same. C) Decrease. D) None of the above. Show Answer Correct Answer: A) Increase also. 20. Which of the following statements is true of the value of acceleration due to gravity? A) The value is the same on the equator and poles. B) The value is least on poles. C) The value is almost negligible on the equator. D) The value increases from pole to equator. Show Answer Correct Answer: C) The value is almost negligible on the equator. 21. If the mass of one object is doubled, how does the gravitational force between two objects change? A) It remains the same. B) It halves. C) It quadruples. D) It doubles. Show Answer Correct Answer: D) It doubles. 22. If the mass of a body is 9.8 kilogram on the earth, what would be its mass on the moon:If the mass of an object is 9.8 kg on the earth, then how much will the mass of that object be on the moon A) 98 kg. B) 9.8/6 kg. C) 9.8 kg. D) 0.98kg. Show Answer Correct Answer: C) 9.8 kg. 23. The atmosphere is held by A) Earth Magnetic Field. B) Gravity. C) Cloud. D) Wind. Show Answer Correct Answer: B) Gravity. 24. Which of the following is Newton's Law on Gravitation? A) F = Gm$_{1}$m$_{2}$/r$^{2}$. B) F=Gm$_{1}$m$_{2}$/r. C) F = Gm$_{1}$m$_{2}$/2r. D) F = m$_{1}$m$_{2}$/2r. Show Answer Correct Answer: A) F = Gm$_{1}$m$_{2}$/r$^{2}$. 25. What is the force of gravity between two objects if the mass of one object is doubled and the distance between them is halved? A) The force is halved. B) The force remains the same. C) The force is quadrupled. D) The force is doubled. Show Answer Correct Answer: C) The force is quadrupled. 26. Weight of an object is directly proportional to mass A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 27. The orbit of a planet is an ellipse with the sun at one of the foci. A) Kepler's First law. B) Kepler's Second law. C) Kepler's third law. D) None of the above. Show Answer Correct Answer: A) Kepler's First law. 28. Suppose Fg between two massive spheres = 90 N. If distance between spheres is tripled, new Fg= A) 10 N. B) 30 N. C) 270 N. D) 810 N. Show Answer Correct Answer: A) 10 N. 29. The force of gravity is ..... to the square of distance A) Inversely proportional. B) Directly proportional. C) All the above. D) None of the above. Show Answer Correct Answer: A) Inversely proportional. 30. The weight of an object at the centre of the earth of radius R, is(a) zero(b) infinite(c) R times the weight at the surface of the earth(d) 1/R times the weight at the surface of the earth A) D. B) A. C) B. D) C. Show Answer Correct Answer: B) A. 31. A 1000-kg car rests on the Earth. The magnitude of Fg of the Earth on the car is: A) 9800 N. B) 6.67 X10-11 N. C) 9.8 N. D) 1000 N. Show Answer Correct Answer: A) 9800 N. 32. Weight of Renu on earth is 600 N. What is the weoght on the moon? A) 600 N. B) 60 kg. C) 100 N. D) 60N. Show Answer Correct Answer: C) 100 N. 33. What is the gravitational force between two objects? A) Attraction at large distance only. B) Attraction at small distance only. C) Attraction at all distances. D) Attraction at large distances but repulsive at small distances. Show Answer Correct Answer: C) Attraction at all distances. 34. A ball is thrown vertically upward with 40 m/s speed. Find the maximum height attained by the ball. Take g =10 m/s2 A) 80 m. B) 160 m. C) Cannot be determined. D) 40 m. Show Answer Correct Answer: A) 80 m. 35. The force of gravitation between two objects depends on only one of their masses. True or False? A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 36. The universal Law of Gravitation explained A) The tides due to moon and the sun. B) The force that binds us to the earth. C) The motion of the planets around the sun. D) All of the above. Show Answer Correct Answer: D) All of the above. 37. A ball is thrown up vertically return to the earth after 12s. Find the velocity with which it was thrown up? A) 29.4m/s. B) 48.8m/s. C) 58.8m/s. D) 36.5m/s. Show Answer Correct Answer: C) 58.8m/s. 38. On the surface of the Earth, the escape velocity is about A) 11.2 km/s. B) 12.1 km/s. C) All the above. D) None of the above. Show Answer Correct Answer: A) 11.2 km/s. 39. Which of the following best describes the concept of weight? A) Weight is the density of an object. B) Weight is the volume of an object. C) Weight is the mass of an object. D) Weight is the force of gravity acting on an object. Show Answer Correct Answer: D) Weight is the force of gravity acting on an object. 40. Which among the following is a wrong differentiation between mass and weight? A) Mass is amount of matter in a body whereas weight is the measure of force acting on body. B) Si unit of mass is kg whereas SI unit of weight is newton. C) Mass has both magnitude and direction whereas weight has only direction. D) Mass can easily be measured by beam balance whereas weight can be measured by spring balance. Show Answer Correct Answer: C) Mass has both magnitude and direction whereas weight has only direction. 41. Two particles are placed at some distance. If the mass of each of the two particle is doubled, keeping the distance between them unchanged, the value of gravitational force betweenthem will be A) Unchanged. B) 1/4 times. C) 1/2 times. D) 4 times. Show Answer Correct Answer: D) 4 times. 42. Which law is responsible for flowing of water into the river A) Law of Conservation of Mass. B) Law of conservation of mass. C) Universal Law of Gravitation. D) Law of Constant Proportion. Show Answer Correct Answer: C) Universal Law of Gravitation. 43. Which law states that the gravitational force between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers? A) Kepler's First Law. B) Newton's Law of Universal Gravitation. C) Kepler's Second Law. D) Newton's First Law. Show Answer Correct Answer: B) Newton's Law of Universal Gravitation. 44. A boy is whirling a stone tied to a string in a horizontal circular path. If the string breaks, the stone A) Will move along a straight line towards the center of the circular path. B) Will move along a straight line perpendicular to the circular path away from the boy. C) Will continue to move in the circular path. D) Will move along a straight line tangential to the circular path. Show Answer Correct Answer: D) Will move along a straight line tangential to the circular path. 45. Gravitational Force Varies Inversaly With Square of:Gravity Poly of Force ..... A) Force/force. B) Distance/distance. C) Mass/mass. D) Product of Mass of Both Objects. Show Answer Correct Answer: B) Distance/distance. 46. The path a planet travels around the sun is called its A) $_{}$ellipse. B) Barycenter. C) Precession. D) Orbit. Show Answer Correct Answer: D) Orbit. 47. Pascal is the S.I Unit of A) Acceleration. B) Force. C) Weight. D) Pressure. Show Answer Correct Answer: D) Pressure. 48. Gravitational forces are: A) Always attractive. B) Always repulsive. C) Sometimes attractive and sometimes repulsive. D) None of these. Show Answer Correct Answer: A) Always attractive. 49. A stone is released from the top of the tower with height 81.64m.Calculate its final velocity before touching the ground A) 50m/s. B) 60m/s. C) 90m/s. D) 40m/s. Show Answer Correct Answer: D) 40m/s. 50. Who formulated the universal law of gravitation A) Mendel. B) Steav Buckner. C) Issac Netwon. D) Marconni. Show Answer Correct Answer: C) Issac Netwon. 51. If the gravitational attraction of the Earth suddenly disappears, which of the following statements will be true? A) The weight of body will become zero but the mass will remain same. B) The weight of a body will remain same but the mass will become zero . C) Both mass and weight become zero. D) Neither mass nor weight becomes zero. Show Answer Correct Answer: A) The weight of body will become zero but the mass will remain same. 52. 2) An apple and stone dropped from a certain height accelerates A) Differently. B) Equally. C) Depending on the density. D) Depending on the position of the sun. Show Answer Correct Answer: B) Equally. 53. Inverse square law was formulated by ..... A) Pascal. B) Kepler. C) Newton. D) Galileo. Show Answer Correct Answer: C) Newton. 54. Which is uniform for a freely falling object? A) Acceleration. B) Displacment. C) Speed. D) Velocity. Show Answer Correct Answer: A) Acceleration. 55. What happen to the force if the masses of two object become double A) 2 time increase. B) 4 times increase. C) 4 times decrease. D) Zero times increase. Show Answer Correct Answer: B) 4 times increase. 56. Gravitational force can extend A) To the objects at 10km. B) To the nearby objects. C) Upto moon. D) Upto infinity. Show Answer Correct Answer: D) Upto infinity. 57. Jupiter is a much more massive planet than Earth. If you traveled to Jupiter, your mass would A) Increase. B) Decrease. C) Remain the same. D) None of the above. Show Answer Correct Answer: C) Remain the same. 58. The value of G is: A) 9.8m/s$^{-2}$. B) 6.683 * 10 $^{-11}$. C) 6.673 * 10$^{-11}$. D) 6.673 * 11$^{-11}$. Show Answer Correct Answer: C) 6.673 * 10$^{-11}$. 59. The weight of an object at the centre of the Earth of radius R is A) R times the weight at the surface of the Earth. B) 1/R$^{2}$ times the weight at surface of the Earth. C) Infinite. D) Zero. Show Answer Correct Answer: D) Zero. 60. If I double the distance between two objects, what happens to their gravitational Force? A) 4x bigger. B) 4x smaller. C) 2x bigger. D) 2x smaller. Show Answer Correct Answer: B) 4x smaller. ← PreviousNext →Related QuizzesScience QuizzesClass 9 QuizzesClass 9 Science Chapter 10 Gravitation Quiz 1Class 9 Science Chapter 10 Gravitation Quiz 3Class 9 Science Chapter 10 Gravitation Quiz 4 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books