This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Physics (Part I) Chapter 6 Gravitation – Quiz 9 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part I) Chapter 6 Gravitation Quiz 9 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Earth is accelerated towards Moon with the same rate at as Moon is accelerated towards Earth. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 2. Newton's law of gravitation A) Is equivalent to Newton's second law of motion. B) Explains the origin of gravitation. C) Is used to make predictions. D) Is not valid in a vacuum. Show Answer Correct Answer: C) Is used to make predictions. 3. The region around Earth in which objects experience a force due to Earth's gravity is called ..... A) Orbit. B) Atmosphere. C) Ozone. D) Gravitational Field. Show Answer Correct Answer: D) Gravitational Field. 4. Why does Earth have different seasons? A) Because of the distance between Earth and the sun. B) Because of the speed of Earth as it rotates on its axis. C) Because of the amount of light blocked by the moon on its axis. D) Because of the tilt of Earth on its axis as it moves around the sun. Show Answer Correct Answer: D) Because of the tilt of Earth on its axis as it moves around the sun. 5. A Polish astronomer, first proposed that Earth and the other planets move around the sun is named? A) Einstein. B) Galileo. C) Ptolemy. D) Copernicus. Show Answer Correct Answer: D) Copernicus. 6. Double the mass of an object, what happens to the force of attraction? A) 4 times stronger gravity force. B) 4 times weaker gravity force. C) 2 times weaker gravity force. D) 2 times stronger gravity force. Show Answer Correct Answer: D) 2 times stronger gravity force. 7. The earth attracts a body of mass 1 kg on its surface with a force of A) 9.8 N. B) 19.6 N. C) 6.67 x 10$^{-11}$ N. D) 2 x 6.67 x 10$^{-11}$ N. Show Answer Correct Answer: A) 9.8 N. 8. A satellite is orbiting the Earth a distance R$_{E}$ above its surface. What is the acceleration due to gravity in this orbit? A) 2.45 m/s$^{2}$. B) 4.9 m/s$^{2}$. C) 9.8 m/s$^{2}$. D) 19.6 m/s$^{2}$. E) 39.2 m/s$^{2}$. Show Answer Correct Answer: A) 2.45 m/s$^{2}$. 9. A spherical planet far out in space has a mass M$_{0}$ and diameter . D$_{0}$ A particle of mass m falling freely near the surface of this planet will experience an acceleration due to gravity which is equal to: A) GM$_{0}$/ D$_{0}$$^{2}$. B) 4GM$_{0}$/ D$_{0}$$^{2}$. C) GM$_{0}$/ 2D$_{0}$$^{2}$. D) 4GM$_{0}$/ 3D$_{0}$$^{2}$. Show Answer Correct Answer: B) 4GM$_{0}$/ D$_{0}$$^{2}$. 10. Compared to the gravitational field of Earth at its surface, Earth's gravitational field at a distance three times as far from Earth's center is about A) One third as much. B) One half as much. C) One ninth as much. D) .zero. Show Answer Correct Answer: C) One ninth as much. 11. If two objects are moved to a distance 3 x further than they were before. How would the gravity force between them change? A) It would be 3x larger. B) It would be 1/3 as large. C) It would be 1/9 as large. D) It would be 9x larger. Show Answer Correct Answer: C) It would be 1/9 as large. 12. What does Kepler's Second Law state about planetary motion? A) Planets move in circular orbits around the Sun. B) The speed of a planet is constant throughout its orbit. C) The distance between a planet and the Sun remains unchanged. D) A line joining a planet and the Sun sweeps out equal areas in equal times. Show Answer Correct Answer: D) A line joining a planet and the Sun sweeps out equal areas in equal times. 13. The formula for calculating gravitational potential energy is ..... A) 1/2 x mass$^{2}$ x gravitational field strength x height. B) Mass x gravitational field strength x height. C) 1/2 x mass x gravitational field strength x height. D) Mass x gravitational field strength x height$^{2}$. Show Answer Correct Answer: B) Mass x gravitational field strength x height. 14. If the distance between two objects is halved, how does the gravitational force between them change? A) It doubles. B) It quadruples. C) It halves. D) It remains the same. Show Answer Correct Answer: B) It quadruples. 15. The mass of the body on moon is 40kg, what is the weight on the earth. A) 100N. B) 500N. C) 400N. D) NONE OF THESE. Show Answer Correct Answer: C) 400N. 16. The moon has no atmosphere because A) Escape velocity is less than r.m.s velocity of gas molecules. B) Escape velocity is greater than r.m.s. velocity of gas molecules. C) Of low temperature on its surface. D) Its high orbital velocity. Show Answer Correct Answer: A) Escape velocity is less than r.m.s velocity of gas molecules. 17. What happens to the force between two charged objects when you double the distance between them? A) 2X. B) 1/2X. C) 4X. D) 1/4X. Show Answer Correct Answer: D) 1/4X. 18. What is the proper setup of the gravitational force formula? A) F$_{g}$= Gm$^{2}$/r. B) F=ma. C) F$_{g}$= Gr$^{2}$/(m$_{1}$+m$_{2}$). D) F$_{g}$= G (m$_{1}$m$_{2}$)/r$^{2}$. Show Answer Correct Answer: D) F$_{g}$= G (m$_{1}$m$_{2}$)/r$^{2}$. 19. In order to shift a body of mass m from a circular orbit of radius 3R to a higher orbit of radius 5R around the earth, the work done is A) $\frac{3GMm}{5R}$. B) $\frac{GMm}{2R}$. C) $\frac{2}{5}\frac{GMm}{R}$. D) $\frac{GMm}{5R}$. Show Answer Correct Answer: C) $\frac{2}{5}\frac{GMm}{R}$. 20. Unit of 'G' is A) N-m$^{2}$/kg. B) N-m/kg$^{2}$. C) N-m$^{2}$/kg2. D) N-m/kg. Show Answer Correct Answer: C) N-m$^{2}$/kg2. 21. Calculate the gravitational force between two objects with masses of 500 kg and 1500 kg separated by a distance of 200 m. (Use $G = 6.67 \times 10^{-11} \, \text{N m}^2 \text{kg}^{-2}$ A) $1.25 \times 10^{-8} \, \text{N}$. B) $2.50 \times 10^{-8} \, \text{N}$. C) $3.75 \times 10^{-8} \, \text{N}$. D) $5.00 \times 10^{-8} \, \text{N}$. Show Answer Correct Answer: A) $1.25 \times 10^{-8} \, \text{N}$. 22. Which quantity remains constant for all objects in free fall near the Earth's surface? A) Speed. B) Velocity. C) Acceleration due to gravity. D) Weight. Show Answer Correct Answer: C) Acceleration due to gravity. 23. This is considered to be a fictitious force? A) Centripetal. B) Centrifugal. C) Torque. D) Universal Gravitation. Show Answer Correct Answer: B) Centrifugal. 24. Gravitational force is: A) Always attractive. B) Always repulsive. C) Sometimes attractive, sometimes repulsive. D) None of the above. Show Answer Correct Answer: A) Always attractive. 25. Which is needed to determine the amount of gravitational force between two objects? A) Distance and mass. B) Weight and time. C) Area and weight. D) None of the above. Show Answer Correct Answer: A) Distance and mass. ← PreviousNext →Related QuizzesClass 11 Physics (Part I) Chapter 6 Gravitation Quiz 1Class 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 10Class 11 Physics (Part I) Chapter 6 Gravitation Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books