This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Physics Part I > Class 11 Physics (Part I) Chapter 6 Gravitation – Quiz 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part I) Chapter 6 Gravitation Quiz 1 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which equation represents Newton's law of universal gravitation? A) $F_g=\frac{Gm_1m_2}{r}$. B) $F_g=\frac{Gm_1m_2}{r^2}$. C) $F_g=\frac{Gm_1r^2}{m_2}$. D) $F_g=\frac{m_1m_2}{Gr^2}$. Show Answer Correct Answer: D) $F_g=\frac{m_1m_2}{Gr^2}$. 2. Universal Gravitation A) The gravitational force on the moon is stronger than on Earth because the moon is closer to the sun. B) The gravitational force on the moon is stronger than on Earth because the moon has more mass than Earth. C) The gravitational force on the moon is weaker than on Earth because the moon has less mass than Earth. D) The gravitational force on the moon is weaker than on Earth because the moon is farther from the sun. Show Answer Correct Answer: C) The gravitational force on the moon is weaker than on Earth because the moon has less mass than Earth. 3. Factor that affect gravitational acceleration ..... A) Distance. B) Speed. C) Mass. D) None of the above. Show Answer Correct Answer: A) Distance. 4. If two objects are brought closer to 1/2 the original distance, by what factor would the gravity force between them change? A) 1/2 as much. B) 1/4 as much. C) 4 x as much. D) 2 x as much. Show Answer Correct Answer: C) 4 x as much. 5. Two asteroids exert a gravitational force, F, on each other. Some time later, the asteroids are now three times as far from each other as before. Which of the following represents the gravitational force at this distance? F=m$_{1}$m$_{2}$/d$^{2}$ A) F=1/9. B) F=1/2. C) F=1/6. D) F=1/3. Show Answer Correct Answer: A) F=1/9. 6. Relationship between radius of circle and centripetal force A) Radius increase, force increase. B) Radius increase, force decrease. C) All the above. D) None of the above. Show Answer Correct Answer: B) Radius increase, force decrease. 7. Orbital velocity of satellite is ..... A) $\sqrt[]{\frac{GM}{\left(R+h\right)^2}}$. B) $\sqrt[]{\frac{GMm}{\left(R+h\right)}}$. C) $\sqrt[]{\frac{G}{\left(R+h\right)}}$. D) $\sqrt[]{\frac{GM}{\left(R+h\right)}}$. Show Answer Correct Answer: D) $\sqrt[]{\frac{GM}{\left(R+h\right)}}$. 8. Observers using different ..... may measure different velocities for an object in motion A) Projectile motions. B) Relatives of motion. C) Constant velocity. D) Frame of reference. Show Answer Correct Answer: D) Frame of reference. 9. A body of mass m kg. starts falling from a point 2R above the Earth's surface. Its kinetic energy when it has fallen to a point 'R' above the Earth's surface [R-Radius of Earth, M-mass of Earth, G-Gravitational Constant] A) $\frac{1}{3}\frac{GMm}{R}$. B) $\frac{1}{6}\frac{GMm}{R}$. C) $\frac{2}{3}\frac{GMm}{R}$. D) $\frac{1}{2}\frac{GMm}{R}$. Show Answer Correct Answer: B) $\frac{1}{6}\frac{GMm}{R}$. 10. What did Newton realize about the motion of all objects? A) They move in circular paths. B) They move in straight paths. C) They move in curved paths. D) They move in zigzag paths. Show Answer Correct Answer: C) They move in curved paths. 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:(Take g = 9.8 m/s$^{2}$) A) 384.16 m/ s. B) 196 m/s. C) 19.6 m/s. D) 3841.4 m/s. Show Answer Correct Answer: C) 19.6 m/s. 12. Higher is the mass ..... is the inertia. A) Lower. B) Higher. C) All the above. D) None of the above. Show Answer Correct Answer: B) Higher. 13. What is the effect of gravity on Earth? A) To increase the speed of falling objects. B) To change the color of objects. C) To keep objects grounded and give them weight. D) To push objects away from each other. Show Answer Correct Answer: C) To keep objects grounded and give them weight. 14. According to the Law of Universal Gravitation, if the distance between two objects is halved, the gravitational force between them becomes: A) Four times as strong. B) Unchanged. C) Twice as strong. D) Half as strong. Show Answer Correct Answer: A) Four times as strong. 15. Which of the following statements about a geostationary satellite is true? A) It has a linear speed equal to the speed of a point on the Earth's equator. B) It remains stationary at any chosen fixed point over the Earth. C) It always moves from east to west. D) It has the same orbital period as the Earth's rotation on its axis. Show Answer Correct Answer: D) It has the same orbital period as the Earth's rotation on its axis. 16. If a powerlifter raises a 1, 000 N weight a distance of 2.0 meters in 0.5 seconds, what is his power output? A) 3, 000 W. B) 2, 000 W. C) 1, 000 W. D) 4, 000 W. Show Answer Correct Answer: D) 4, 000 W. 17. What does the gravitational force depend on? A) Mass and distance. B) Velocity and time. C) Acceleration and force. D) Energy and power. Show Answer Correct Answer: A) Mass and distance. 18. Gravitational pull is greatest: A) At the beach. B) On the moon. C) On top of Mt. Everest. D) In an airplane. Show Answer Correct Answer: A) At the beach. 19. The value of g ..... as we move above the surface of earth A) Increases. B) Decreases. C) Constant. D) None. Show Answer Correct Answer: B) Decreases. 20. The area under a Force-distance graph is ..... A) The potential difference of a mass. B) The energy lost by the mass. C) The charge on a mass. D) The work done on a mass. Show Answer Correct Answer: D) The work done on a mass. 21. A 150 kg man is standing on top of the empire state building, at a height of 200 m. What is his potential energy in that moment? A) 405000 j. B) 294000 j. C) 305000 j. D) 194 j. Show Answer Correct Answer: B) 294000 j. 22. A girl stands on a box having 60 cm length, 40 cm breadth and 20 cm width in three ways. In which of the following cases, pressure exerted by the brick will be A) Maximum when length and breadth form the base. B) Maximum when breadth and width form the base. C) Maximum when width and length form the base. D) The same in all the above three cases. Show Answer Correct Answer: B) Maximum when breadth and width form the base. 23. What are the two factors that influence gravity the most? A) Mass and weight. B) Weight and gravity. C) Mass and distance. D) Weight and distance. Show Answer Correct Answer: C) Mass and distance. 24. A bicycle has a period of 0.3s . What is thethe angular speed of its tires if their radius is 30 cm? A) 6 m/s. B) 60 m/s. C) 3 m/s. D) 30 m/s. Show Answer Correct Answer: A) 6 m/s. 25. The necessary ..... force for the satellite is provided by ..... force. A) Centripetal, electrostatic. B) Gravitational, centripetal. C) Centripetal, gravitational. D) Magnetic, gravitational. Show Answer Correct Answer: C) Centripetal, gravitational. 26. When you are holding a book, energy is stored between the book and Earth; this type of energy is called ..... potential energy. A) Electric Energy. B) Gravitational Potential Energy. C) Chemical Energy. D) Kinetic Energy. Show Answer Correct Answer: B) Gravitational Potential Energy. 27. Aria and Ethan are conducting a physics experiment. They need to calculate the gravitational force between two 5, 000 kg masses that are 20 meters apart using scientific notation. Use $G = 6.674 \times 10^{-11} \, \text{N m}^2/\text{kg}^2$ A) $3.337 \times 10^{-8} \, \text{N}$. B) $8.3425 \times 10^{-8} \, \text{N}$. C) $1.6685 \times 10^{-8} \, \text{N}$. D) $4.17125 \times 10^{-8} \, \text{N}$. Show Answer Correct Answer: D) $4.17125 \times 10^{-8} \, \text{N}$. 28. Which experiment can be used to measure the gravitational constant (G)? A) Young's double-slit experiment. B) Rutherford gold foil experiment. C) Millikan oil drop experiment. D) Cavendish experiment. Show Answer Correct Answer: D) Cavendish experiment. 29. A ball is thrown upward with an initial speed of 20 m/s. What is the height of the ball after 2 seconds? A) 30 m. B) 40 m. C) 20 m. D) 10 m. Show Answer Correct Answer: C) 20 m. 30. What is the gravitational potential energy (GPE) of a 500 gram book that is 1 meter above the ground? g = 9.8 m/s$^{2}$$^{Watch out for units!}$ A) 11.8 m/s$^{2}$. B) 4.9 Joules. C) 1.0 Joule. D) 0.10 Joule. Show Answer Correct Answer: B) 4.9 Joules. 31. When placed at equal distances apart, the greatest gravitational attraction will be between two A) Skateboards. B) Bowling balls. C) School buses. D) None of the above. Show Answer Correct Answer: C) School buses. 32. When 'g' is opposing the velocity, its value is taken A) Positive. B) Negative. C) Negligible. D) None of the above. Show Answer Correct Answer: B) Negative. 33. An astronaut on the Moon drops a hammer and a feather from the same height at the same time. What will happen and why? A) Both will hit the ground at the same time because there is no air resistance on the Moon. B) The hammer will hit the ground first because it is heavier. C) The feather will hit the ground first because it is lighter. D) Both will float in the air because there is no gravity on the Moon. Show Answer Correct Answer: A) Both will hit the ground at the same time because there is no air resistance on the Moon. 34. Planets orbit the Sun in a shape called a(n) A) Focus. B) Perihelion. C) Circle. D) Ellipse. Show Answer Correct Answer: D) Ellipse. 35. Who found the Gravitational Constant A) Einstein. B) Newton. C) Cavendish. D) Galileo. Show Answer Correct Answer: C) Cavendish. 36. Two large objects of equal mass, m, are separated by a distance r and exert a gravitational pull of magnitude F. If the distance between the two objects is reduced to r/4, what is the new gravitational force acting on each object? A) 4F. B) 16F. C) F/4. D) F/16. E) F/2. Show Answer Correct Answer: B) 16F. 37. If the mass of one object is doubled while the distance between two objects remains the same, how does the gravitational force between them change? A) It becomes twice as strong. B) It becomes half as strong. C) It becomes four times as strong. D) It remains the same. Show Answer Correct Answer: A) It becomes twice as strong. 38. The measure of the pull of gravity on an object is ..... A) Friction. B) Speed. C) Motion. D) Weight. Show Answer Correct Answer: D) Weight. 39. ..... is the angular momentum of the satellite. A) $\sqrt[]{GMm^2}$. B) $\sqrt[]{GMrm^{ }}$. C) $\sqrt[]{GMr^2}$. D) $\sqrt[]{GMrm^2}$. Show Answer Correct Answer: D) $\sqrt[]{GMrm^2}$. 40. An object's gravitational potential energy store can be increased by ..... A) Decreasing the mass of the object. B) Decreasing the size of the object. C) By lifting the object higher. D) Increasing the velocity (speed) of the object. Show Answer Correct Answer: C) By lifting the object higher. 41. The gravitational force between two objects is F. If masses of both the objects are halved without altering the distance between them, then the gravitational force would become A) 2f. B) F/4. C) F/2. D) F. Show Answer Correct Answer: B) F/4. 42. Two objects with equal masses of 1 kg each are separated by a distance of 1 m. The gravitational force between the objects is: A) Half as much of G. B) Slightly greater that G. C) Equal to G. D) Slightly less than G. Show Answer Correct Answer: C) Equal to G. 43. When will the gravity between two objects be the LEAST? A) When the masses of both objects is small and the objects are close together. B) When the masses of both objects is small and the objects are far apart. C) When the masses of both objects is large and the objects are close together. D) When the masses of both objects is large and the objects are far apart. Show Answer Correct Answer: B) When the masses of both objects is small and the objects are far apart. 44. An apple hangs on a tree on the Earth. Which of the following statements is correct? A) The force on the apple is greater than the force on the Earth because the Earth is more massive. B) The forces on the apple and the Earth are zero because they are not touching each other. C) The force on the apple is less than the force on the Earth because the tree is supporting the apple. D) The forces on the apple and Earth are equal. Show Answer Correct Answer: D) The forces on the apple and Earth are equal. 45. If Mass 1 is doubled (2m) and the distance between the two masses is doubled (2r), the force of gravity will ..... A) Reduce be a factor of 4. B) Double. C) Quadruple. D) Be half. Show Answer Correct Answer: D) Be half. 46. Kepler's first law states that the Sun is located at one ..... of a planet's orbit. A) Ellipse. B) Center. C) Outside. D) Focus. Show Answer Correct Answer: D) Focus. 47. If the mass of one of two spheres increases, how does it affect the gravity between the two spheres? A) The gravity is not affected. B) The gravity decreases. C) The gravity fluctuates. D) The gravity increases. Show Answer Correct Answer: D) The gravity increases. 48. If the mass of the Sun is doubled, while that of the Earth is halved, then the Fg between them A) Is doubled. B) Stays the same. C) Is 1.5 times greater than the original. D) Is halved. Show Answer Correct Answer: B) Stays the same. 49. A 100 kg man is on top of a 10 m tall hill. Find his gravitational potential energy A) 10500 J. B) 2000 J. C) 9800 J. D) 4500 J. Show Answer Correct Answer: C) 9800 J. 50. Two spherical objects have masses of 300 kg and 600 kg. Their centers are separated by a distance of 26 m. Find the gravitational attraction between them. A) 1.78 x 10$^{-8}$. B) .00000524. C) 4.26 x 10$^{-5}$. D) 1.95 x 10$^{-11}$. Show Answer Correct Answer: A) 1.78 x 10$^{-8}$. 51. A geostationary satellite orbits the Earth ..... A) Once every 4 weeks. B) Once every week. C) Once every 10-11 hours. D) Once every 24 hours. Show Answer Correct Answer: D) Once every 24 hours. 52. If the mass of one object gets smaller, what happens to the gravity between two objects? A) Gets bigger. B) Gets smaller. C) Does not change. D) None of the above. Show Answer Correct Answer: B) Gets smaller. 53. If the original gravitational force between two objects is 100 N and one objects mass triples, one mass doubles, and the distance between them is halved, what would the new force be? A) 100 N. B) 1200 N. C) 2400 N. D) 750 N. Show Answer Correct Answer: C) 2400 N. 54. If all are equal distances apart, which has the greatest gravitational pull? A) Feather. B) Dog. C) Elephant. D) Ant. Show Answer Correct Answer: C) Elephant. 55. Which of the following best describes Kepler's first law of planetary motion? A) The orbit of a planet is a perfect circle with the Sun at the center. B) The orbit of a planet is an ellipse with the Sun at one focus. C) The orbit of a planet is a hyperbola with the Sun at one focus. D) The orbit of a planet is a parabola with the Sun at the vertex. Show Answer Correct Answer: B) The orbit of a planet is an ellipse with the Sun at one focus. 56. Which of the following does not affect the gravitational force between the earth and the sun? A) The mass of the earth. B) The mass of the sun. C) The distance between the earth and the sun. D) The net electrical charge of the earth. Show Answer Correct Answer: D) The net electrical charge of the earth. 57. At what depth below the surface of earth the acceleration due to gravity becomes half the value on the surface of the earth? A) R. B) R/7. C) R/2. D) R/4. Show Answer Correct Answer: C) R/2. 58. The apparent weightlessness astronauts experience is due to lack of contact forces exerted on them A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 59. Which of the following does not apply to the moment when Spring tides happen? A) During new moon. B) During full moon. C) When the moon and the earth are alligned with the sun. D) During quarter moon. Show Answer Correct Answer: D) During quarter moon. 60. The value of acceleration due to gravity on the surface of Earth is 'g. It becomes g/2 at the depth h equal to A) R. B) 2R. C) R/2. D) R/4. Show Answer Correct Answer: C) R/2. Next →Related QuizzesScience QuizzesClass 11 QuizzesClass 11 Physics (Part I) Chapter 6 Gravitation Quiz 2Class 11 Physics (Part I) Chapter 6 Gravitation Quiz 3Class 11 Physics (Part I) Chapter 6 Gravitation Quiz 4Class 11 Physics (Part I) Chapter 6 Gravitation Quiz 5Class 11 Physics (Part I) Chapter 6 Gravitation Quiz 6Class 11 Physics (Part I) Chapter 6 Gravitation Quiz 7Class 11 Physics (Part I) Chapter 6 Gravitation Quiz 8Class 11 Physics (Part I) Chapter 6 Gravitation Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books