This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Physics (Part I) Chapter 6 Gravitation – Quiz 3 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part I) Chapter 6 Gravitation Quiz 3 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. 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) 1.95 x 10$^{-11}$. B) 4.26 x 10$^{-5}$. C) .00000524. D) 1.78 x 10$^{-8}$. Show Answer Correct Answer: D) 1.78 x 10$^{-8}$. 2. A geostationary satellite orbits the Earth ..... A) Once every 24 hours. B) Once every week. C) Once every 10-11 hours. D) Once every 4 weeks. Show Answer Correct Answer: A) Once every 24 hours. 3. 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. 4. 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) 2400 N. C) 1200 N. D) 750 N. Show Answer Correct Answer: B) 2400 N. 5. If all are equal distances apart, which has the greatest gravitational pull? A) Elephant. B) Ant. C) Dog. D) Feather. Show Answer Correct Answer: A) Elephant. 6. 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 parabola with the Sun at the vertex. D) The orbit of a planet is a hyperbola with the Sun at one focus. Show Answer Correct Answer: B) The orbit of a planet is an ellipse with the Sun at one focus. 7. 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. 8. 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/2. B) R/4. C) R/7. D) R. Show Answer Correct Answer: A) R/2. 9. 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. 10. 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. 11. 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. 12. The acceleration due to gravity depends A) Only on the mass of the planet. B) Only on the size of the planet. C) On both the size and mass of the planet. D) None of these. Show Answer Correct Answer: C) On both the size and mass of the planet. 13. An astronaut way out in space is considered to be "weightless" . This is because- A) His mass is so small relative to the earth that gravity doesn't affect him. B) Gravitational force increases greatly over long distances. C) Gravitational force pushes objects away from each other at long distances. D) Objects far away from the earth have less mass. Show Answer Correct Answer: A) His mass is so small relative to the earth that gravity doesn't affect him. 14. According to Newton's law of gravitation, the Earth and the Moon are gravitationally attracted to each other. The more massive Earth attracts the Moon with ..... A) A stronger force than the Moon attracts the Earth. B) A weaker force than the Moon attracts the Earth. C) A force that is sometimes stronger and other times weaker than the Moon attracts the Earth. D) The same force as the Moon attracts the Earth. Show Answer Correct Answer: D) The same force as the Moon attracts the Earth. 15. The strength of the gravitational force between two objects depends on A) Mass and Matter. B) Mass and Weight. C) Mass and Distance. D) Mass and Strength. Show Answer Correct Answer: C) Mass and Distance. 16. Calculate the gravitational force between two objects when they are 0.750m apart. Each object has a mass of 5.00kg. A) 2.96 x 10$^{-7 }$N. B) 3.00 x 10$^{-6 }$N. C) 2.22 x 10$^{-9 }$N. D) 2.23 x 10$^{-8 }$N. Show Answer Correct Answer: A) 2.96 x 10$^{-7 }$N. 17. As the distance between objects increases ..... A) The smaller the force of gravity. B) The larger the force of gravity. C) Mass has no effect on the amount of gravity an object experiences. D) None of the above. Show Answer Correct Answer: A) The smaller the force of gravity. 18. Centripetal force, created by swinging something in a circle, acts in a direction ..... A) Along the path of motion. B) Away from the center of the circle. C) Toward the center of the circle. D) Tangent to the circle. Show Answer Correct Answer: C) Toward the center of the circle. 19. Which of the following best describes the relationship between a planet's orbital speed and its distance from the Sun according to Kepler's second law? A) The speed is constant regardless of distance. B) The speed increases as the distance increases. C) The speed decreases as the distance increases. D) The speed is unrelated to the distance. Show Answer Correct Answer: C) The speed decreases as the distance increases. 20. Two satellites A and B of masses $m_1$ $m_2$ $\left(m_1=2m_2\right)$ $r_1$ $r_2$ $\left(r_1=4r_2\right)$ $T_A$ $T_B$ $\frac{T_A}{T_B}$ A) 4. B) 16. C) 2. D) 8. Show Answer Correct Answer: D) 8. 21. Amanda weighs about 600 N on Earth, but would only weigh about 100 N on the Moon. Which BEST explains why Amanda would weigh less on the Moon than on Earth? A) The circumference of the Moon is smaller than Earth, therefore it has less gravity. B) The lack of air pressure on the Moon weakens the gravitational force of the Moon. C) The mass of the Moon is less than that of Earth, therefore it has a weaker gravitational force. D) None of the above. Show Answer Correct Answer: C) The mass of the Moon is less than that of Earth, therefore it has a weaker gravitational force. 22. Which of the following never changes no matter where in the universe? A) Weight. B) Force. C) Mass. D) Pounds. Show Answer Correct Answer: C) Mass. 23. An object having mass equal to 350 g occupies 200 cm$^{3}$ of the space. When this object is thrown into a river what will be the condition of this object there? (Density of water = 1 g/ cm$^{3}$) A) It will float on the surface of water. B) It will float fully submerged in the liquid. C) It will sink in the liquid. D) It will float partially submerged in the liquid. Show Answer Correct Answer: C) It will sink in the liquid. 24. Two masses m$_{1}$ and m$_{2}$ are separated by a distance R and gravitaional force between them is F. If the distance R is reduced to R/2 the force will now be A) 8X. B) 2X. C) 1/4. D) 1/2. E) 4X. Show Answer Correct Answer: E) 4X. 25. Which of the following describes angular velocity? A) Rate of change of linear velocity. B) Rate of change of angle with respect to time. C) Distance traveled per unit time. D) Acceleration in a circular path. Show Answer Correct Answer: B) Rate of change of angle with respect to time. ← 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 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 9Class 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