This quiz works best with JavaScript enabled. Home > Class 11 > 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 (25 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) $F_g=\frac{m_1m_2}{Gr^2}$. C) $F_g=\frac{Gm_1m_2}{r^2}$. D) $F_g=\frac{Gm_1r^2}{m_2}$. Show Answer Correct Answer: B) $F_g=\frac{m_1m_2}{Gr^2}$. 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 weaker than on Earth because the moon has less mass than Earth. C) The gravitational force on the moon is stronger than on Earth because the moon has more 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: B) 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) 2 x as much. C) 4 x as much. D) 1/4 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=1/3. B) F=1/2. C) F=1/6. D) F=1/9. Show Answer Correct Answer: D) 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) $\sqrt[]{\frac{G}{\left(R+h\right)}}$. B) $\sqrt[]{\frac{GMm}{\left(R+h\right)}}$. C) $\sqrt[]{\frac{GM}{\left(R+h\right)}}$. D) $\sqrt[]{\frac{GM}{\left(R+h\right)^2}}$. Show Answer Correct Answer: C) $\sqrt[]{\frac{GM}{\left(R+h\right)}}$. 8. Observers using different ..... may measure different velocities for an object in motion A) Frame of reference. B) Relatives of motion. C) Projectile motions. D) Constant velocity. Show Answer Correct Answer: A) 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) $\frac{1}{2}\frac{GMm}{R}$. B) $\frac{1}{6}\frac{GMm}{R}$. C) $\frac{2}{3}\frac{GMm}{R}$. D) $\frac{1}{3}\frac{GMm}{R}$. 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 zigzag paths. C) They move in curved paths. D) They move in straight 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) Half as strong. B) Twice as strong. C) Four times as strong. D) Unchanged. Show Answer Correct Answer: C) Four times as strong. 15. Which of the following statements about a geostationary satellite is true? A) It always moves from east to west. B) It remains stationary at any chosen fixed point over the Earth. C) It has a linear speed equal to the speed of a point on the Earth's equator. 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) 1, 000 W. B) 2, 000 W. C) 3, 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) On top of Mt. Everest. B) At the beach. C) In an airplane. D) On the moon. Show Answer Correct Answer: B) 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 energy lost by the mass. B) The work done on a mass. C) The charge on a mass. D) The potential difference of a mass. Show Answer Correct Answer: B) 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) 294000 j. B) 194 j. C) 305000 j. D) 405000 j. Show Answer Correct Answer: A) 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) 3 m/s. C) 60 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) Magnetic, gravitational. B) Gravitational, centripetal. C) Centripetal, electrostatic. D) Centripetal, gravitational. Show Answer Correct Answer: D) Centripetal, gravitational. 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