This quiz works best with JavaScript enabled. Home > Cbse > Class 9 > Science > Gravitation > Class 9 Science Chapter 10 Gravitation – Quiz 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 9 Science Chapter 10 Gravitation Quiz 1 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the value of the gravitational constant (G) in SI units? A) $3.00 \times 10^8 \, \text{m/s}$. B) $9.81 \, \text{m/s}^2$. C) $6.674 \times 10^{-11} \, \text{Nm}^2/\text{kg}^2$. D) $1.60 \times 10^{-19} \, \text{C}$. Show Answer Correct Answer: C) $6.674 \times 10^{-11} \, \text{Nm}^2/\text{kg}^2$. 2. Acceleration du to gravity on the poles is A) Same as that on the equator. B) Less than that on the equator. C) Less than or greater than that on the equator. D) Greater than that on the equator. Show Answer Correct Answer: D) Greater than that on the equator. 3. If the distance between two bodies is increased by 25%, then the % change in the gravitational force is A) Increases by 36%. B) Decreases by 64%. C) Increases by 64%. D) Decreases by 36%. Show Answer Correct Answer: D) Decreases by 36%. 4. The atmosphere is held to the Earth by A) Earth's magnetic field. B) Wind. C) Clouds. D) Gravity. Show Answer Correct Answer: D) Gravity. 5. Which of the following statements about gravitational force is correct? A) Gravitational force acts only on objects with mass. B) Gravitational force is inversely proportional to the square of the distance between two objects. C) Gravitational force is stronger than electromagnetic force. D) Gravitational force is a contact force. Show Answer Correct Answer: B) Gravitational force is inversely proportional to the square of the distance between two objects. 6. Which of the following statements is true about gravitational force? A) It decreases with increasing mass. B) It can be shielded by certain materials. C) It is a contact force. D) It only acts on objects with mass. Show Answer Correct Answer: D) It only acts on objects with mass. 7. The value of g also ..... we go inside the earth. A) Same. B) Changes. C) All the above. D) None of the above. Show Answer Correct Answer: B) Changes. 8. 4) The atmosphere consisting of a large number of gases is held to the earth by: A) Winds. B) Earth's magnetic field. C) Gravity. D) Clouds. Show Answer Correct Answer: C) Gravity. 9. If the gravitational force between two objects is 100 N and the distance between them is doubled, what is the new gravitational force? A) 25 N. B) 50 N. C) 100 N. D) 200 N. Show Answer Correct Answer: A) 25 N. 10. Where does an object show weightlessness A) Over the ground surface. B) When a body is in the state of free fall. C) In between the top of building and earth surface. D) Any Where. Show Answer Correct Answer: B) When a body is in the state of free fall. 11. A stone is released from the top of a tower of height 19.6 m. Then its final velocity just before touching the ground will be: A) 196 m/s. B) 384.16 m/ s. C) 19.6 m/s. D) 3841.4 m/s. Show Answer Correct Answer: C) 19.6 m/s. 12. When an object is fed down from one height, what will be the initial velocity of that object:when a body is dropped from a height, what is its initial velocity: A) Minimum /minimum. B) Maximum / maximum. C) Depends on Situation /situation will depend on. D) Zero /zero. Show Answer Correct Answer: D) Zero /zero. 13. When a body is thrown toward the centre of earth, then acceleration due to gravity is A) Negative. B) Neutral. C) Zero. D) Positive. Show Answer Correct Answer: D) Positive. 14. An object weighs 10 N in air. When immersed fully in water, it weighs only 8 N. The weight ofthe liquid displaced by the object will be(a) 2N (b)8N (c) 10N (d) 12N A) D. B) A. C) B. D) C. Show Answer Correct Answer: B) A. 15. The force that keeps the body in a circular path and is acting towards the center is called? A) Central force. B) Frictional Force. C) Centripetal Force. D) None of the above. Show Answer Correct Answer: C) Centripetal Force. 16. Mass of the earth is ..... A) 24X10$^{6}$ kg. B) 6x10 $ ^ {24} $ kg. C) 6.673X10$^{-11}$ kg. D) 6.4X10$^{20}$kg. Show Answer Correct Answer: B) 6x10 $ ^ {24} $ kg. 17. The gravitational force between two objects is F. If masses of both objects are halved without changing the distance between them, then the gravitational force would become A) F/2. B) F/8. C) 4F. D) F/4. Show Answer Correct Answer: D) F/4. 18. 1) The Gravitation constant is denoted by which symbol? A) G. B) M. C) G. D) K. Show Answer Correct Answer: A) G. 19. Acceleration due to gravity on the surface of a planet is g/5 where g is the value on the earth. When a body is vertically thrown up on the earth, it reaches a maximum height h. If the same body is projected with the same velocity from the surface of planet, maximum height reached by it would be A) H/5. B) H/25. C) Etc. D) 25h. Show Answer Correct Answer: C) Etc. 20. Every object in the universe attract each other with A) Different forces. B) Same force in the same direction. C) Equal and opposite force. D) A force greater than the other. Show Answer Correct Answer: C) Equal and opposite force. 21. If mass is less gravitation will be A) Less. B) More. C) Constant. D) Equal. Show Answer Correct Answer: A) Less. 22. What states that "every object in the universe attracts every other object" ? A) Newton's First Law of Motion. B) Law of Universal Gravitation. C) My mother. D) Inertia & gravity. Show Answer Correct Answer: B) Law of Universal Gravitation. 23. Law of gravitation gives the gravitational force between A) The Earth and a point mass only. B) The Earth and Sun only. C) Any two bodies having some mass. D) Two charged bodies only. Show Answer Correct Answer: C) Any two bodies having some mass. 24. Two objects move toward each other gravitationally. As they get closer, the force between them: A) Remains constant. B) Increases. C) Decreases. D) None of the above. Show Answer Correct Answer: B) Increases. 25. Weight of an object on moon =? A) 1/6 * its mass on earth. B) 1/6 * twice its weight on earth. C) 1/6 * its weight on earth. D) None of the above. Show Answer Correct Answer: C) 1/6 * its weight on earth. 26. In which location would you weight the least? A) Venus. B) Earth. C) Jupiter. D) Moon. Show Answer Correct Answer: D) Moon. 27. Which is the strongest force in nature A) Weak nuclear force. B) Strong Nuclear force. C) Electrostatic force. D) Gravitational force. Show Answer Correct Answer: B) Strong Nuclear force. 28. Properties of weight are given below which is not correct A) Variable from place to place. B) Force exerted by body on earth. C) Never zero or negative. D) Si unit is N. Show Answer Correct Answer: C) Never zero or negative. 29. A coin and a feather are dropped together in a vacuum. Then (a) the coin will reach the ground first (b) the feather will reach the ground first (c) both will reach the ground at the same time (d) the feather will not fall down A) D. B) C. C) A. D) B. Show Answer Correct Answer: B) C. 30. What is the value of g? A) 8.9 m/s$^{-2}$. B) 8.66 m/s$^{-11}$. C) 9.8 m/s$^{-2}$. D) 9.3 m/s$^{-2}$. Show Answer Correct Answer: C) 9.8 m/s$^{-2}$. 31. Two particles are placed at some distance. If the mass of each of the two particles is doubled, keeping the distance between them is increased by two times, the value of gravitational force between them will be A) 1/8 times. B) 1/16 times. C) 1/4 times. D) Unchanged. Show Answer Correct Answer: D) Unchanged. 32. Even if we go to another planet ..... remains the same A) Weight. B) Mass. C) All the above. D) None of the above. Show Answer Correct Answer: B) Mass. 33. The period of a satellite in a circular orbit of radius R is T. The period of another satellite in circular orbit of radius 4R is A) $\frac{T}{8}$. B) Cat. C) 8T. D) $\frac{T}{4}$. Show Answer Correct Answer: C) 8T. 34. In a vaccum, all freely falling objects A) Have the same velocity. B) Have the same speed. C) Have the same force. D) Have the same acceleration. Show Answer Correct Answer: D) Have the same acceleration. 35. The value of Universal Gravitational constant is A) 6.673X10$^{-11}$ Nm$^{2 }$kg$^{-2}$. B) 6.673 x10$^{-11 }$N m$^{-2 }$kg$^{-2}$. C) 6.673X10$^{-11}$ Nm$^{-2}$kg$^{2}$. D) 6.673X10$^{-11}$ Nm$^{2}$kg$^{2}$. Show Answer Correct Answer: A) 6.673X10$^{-11}$ Nm$^{2 }$kg$^{-2}$. 36. The value of 'g' ..... if we go inside the Earth A) Changes. B) Remains the same. C) All the above. D) None of the above. Show Answer Correct Answer: A) Changes. 37. A man can jump to a height of 1.5 m on a planet A.What is the height he may be able to jump on another planet whose mass and radius are double to the planet A A) 1. B) 6.0m. C) 4. The House. D) 3.0m. Show Answer Correct Answer: D) 3.0m. 38. The Constant G:G's constant: A) Is a very small quantity/very small quantity. B) Is a force/force. C) Is the same as g/ g. D) Decrease with increasing altitude/decreases with rising height. Show Answer Correct Answer: A) Is a very small quantity/very small quantity. 39. The value of quantity G in the law of gravitation A) Depends on mass of Earth only. B) Depends on radius of Earth only. C) Depends on both mass and radius of Earth. D) Is independent of mass and radius of the Earth. Show Answer Correct Answer: D) Is independent of mass and radius of the Earth. 40. The force of attraction between two unit point masses separated by a unit distance is called A) Acceleration due to gravity. B) Gravitational potential. C) Universal gravitational constant. D) Gravitational field. Show Answer Correct Answer: C) Universal gravitational constant. 41. An apple falls from a tree because of the gravitational attraction between the earth and the apple. If F1 is the magnitude of the force exerted by the earth on the apple and F2 is the magnitude of the force exerted by the apple on the earth, then A) F1 is very much greater than F2. B) F2 is very much greater than F1. C) F1 and F2 are equal. D) F1 is only a little greater than F2. Show Answer Correct Answer: C) F1 and F2 are equal. 42. The mass of moon is about 0.012 times that of the earth and its diameter is about 0.25 times that of earth. The value of G on the moon will be: A) Same as that on the earth. B) About one-sixth of that on the earth. C) About one-fifth of that on the earth. D) About one-fourth of that on the earth. Show Answer Correct Answer: A) Same as that on the earth. 43. The value of universal gravitational constant G in the formula for gravitational force: A) Depends on mass of the earth only. B) Depends on the radius of earth only. C) Depends on both mass and radius of earth. D) Depends neither on mass nor on radius of earth. Show Answer Correct Answer: D) Depends neither on mass nor on radius of earth. 44. When a body is thrown vertically upward, what will be its final velocity A) Maximum. B) Minimum. C) Zero. D) None of these. Show Answer Correct Answer: C) Zero. 45. Where will it be profitable to purchase 1 kg sugar (by spring balance) A) At 60$^\circ$latitude. B) At equator. C) At 45$^\circ$ latitude. D) At poles. Show Answer Correct Answer: B) At equator. 46. What is the force that causes objects to fall towards the Earth? A) Gravitational force. B) Electromagnetic force. C) Nuclear force. D) Frictional force. Show Answer Correct Answer: A) Gravitational force. 47. If you stood on a ladder so you were twice as far from Earth's centre, your weight would be: A) One quarter its normal value. B) 90 times the normal value. C) One eight its normal value. D) Half its normal value. Show Answer Correct Answer: A) One quarter its normal value. 48. Suppose Fg between two massive spheres M and m is F. If masses were M and 3m, Fg would be: A) Row. B) Pardon. C) 1/row. D) 1/p. Show Answer Correct Answer: B) Pardon. 49. Tom and Jerry pass each other in the hallway. Tom has a mass of 65 kg, and Jerry has a mass of 55 kg. If the center of mass of the two students is 1.00 m, then what is the force acting on Tom? A) 2.1 x 10$^{-7 }$N. B) 3.4 x 10$^{-7 }$N. C) 2.4 x 10$^{-7 }$N. D) 2.9 x 10$^{-7 }$N. Show Answer Correct Answer: C) 2.4 x 10$^{-7 }$N. 50. When a planet orbits the Sun, one of the foci of the elliptical orbit is A) The Sun. B) The radius. C) The axis. D) The center. Show Answer Correct Answer: A) The Sun. 51. An object has a mass 36 kg on earth find its weight on the moon (approximated values) A) 300 N. B) 10 N. C) 360 N. D) 60 N. Show Answer Correct Answer: D) 60 N. 52. The ball is thrown up, the value of 'g' will be A) Negligible. B) Negative. C) Zero. D) Positive. Show Answer Correct Answer: B) Negative. 53. When a mango falls from a mango tree then A) Only the Earth attracts the mango. B) Only the mango attracts the Earth. C) Both the mango and the Earth attract each other. D) Both the mango and the Earth repel each other. Show Answer Correct Answer: C) Both the mango and the Earth attract each other. 54. A ball is thrown vertically upward with 40 m/s speed. Find the time when it reaches the maximum height. Take g =10 m/s2 A) 4 sec. B) 40 sec. C) 2 sec. D) Cannot be determined. Show Answer Correct Answer: A) 4 sec. 55. The S.I unit of 'g' is A) M/sec. B) M. C) N. D) M/sec$^{2}$. Show Answer Correct Answer: D) M/sec$^{2}$. 56. Name the force that cause acceleration of an object moving along a circle and keeps the body moving A) Centripetal force. B) Frictional force. C) Gravitational force. D) Centrifugal force. Show Answer Correct Answer: A) Centripetal force. 57. If I double the mass of one object, but don't change anything else ..... WHat happens to the gravitational force between two objects? A) Doubles. B) Quadruplets. C) Cut in Half. D) 4x Smaller. Show Answer Correct Answer: A) Doubles. 58. A stone dropped from the roof of a building takes 4s to reach the ground.Calculate the height of the building.A stone that is released from the roof of a building reaches the earth in 4s.Remove the height of the building. A) 40 km. B) 32 m. C) 78.4 m. D) 89.8 m. Show Answer Correct Answer: C) 78.4 m. 59. What is 0 in upward free fall A) V. B) S. C) A. D) U. Show Answer Correct Answer: A) V. 60. In the relation, F= GMm/R$^{2}$$^{the quantity G}$ A) Experience forces of different magnitude. B) Is universal constant of nature. C) Is used only when the earth is one of two masses. D) Depend on the value of g at the place of observation. Show Answer Correct Answer: B) Is universal constant of nature. Next →Related QuizzesScience QuizzesClass 9 QuizzesClass 9 Science Chapter 10 Gravitation Quiz 2Class 9 Science Chapter 10 Gravitation Quiz 3Class 9 Science Chapter 10 Gravitation Quiz 4 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books