This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Physics (Part I) Chapter 6 Gravitation – Quiz 14 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part I) Chapter 6 Gravitation Quiz 14 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A coin was tossed vertically upward at a speed of 10.0 m/s from the ground. (a) What is the peak height of the coin? A) 4.08 m. B) 5.10 m. C) 6.12 m. D) 7.14 m. Show Answer Correct Answer: B) 5.10 m. 2. Which of the following relation is true, where r = distance of a planet from the sun and T = Time Period? A) $r^2\propto T^3$. B) $r^3\propto T^3$. C) $r^3\propto T^2$. D) $r^2\propto T^2$. Show Answer Correct Answer: C) $r^3\propto T^2$. 3. V is the orbital velocity of a satellite revolving very close to the surface of earth. The orbital velocity of a geostationary satellite orbiting in a circular orbit at an altitude 6 times radius of earth is. A) $\sqrt{7}v$. B) $\frac{v}{\sqrt{7}}$. C) $\sqrt{6}v$. D) $\frac{v}{\sqrt{6}}$. Show Answer Correct Answer: B) $\frac{v}{\sqrt{7}}$. 4. Mass and weight are different. Mass depends on ..... Weight depends on ..... A) Gravitational force, the amount of matter. B) Placement, force. C) Force, placement. D) The amount of matter, gravitational force. Show Answer Correct Answer: D) The amount of matter, gravitational force. 5. Which of the following does not apply to the moment when Spring tides happen? (HINT:Spring tides happen when there is a straight line with the Earth, sun and moon) 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. 6. State Kepler's First Law of Planetary Motion. A) The orbit of a planet is an ellipse with the Sun at one focus. B) The orbit of a planet is a spiral path around the Sun. C) The orbit of a planet is a perfect circle with the Sun at the center. D) The orbit of a planet is a straight line from the Sun. Show Answer Correct Answer: A) The orbit of a planet is an ellipse with the Sun at one focus. 7. What is the net displacement and total distance covered by a stone thrown vertically upward? A) Net displacement is zero, total distance covered is zero. B) Net displacement is zero, total distance covered is non-zero. C) Net displacement is non-zero, total distance covered is zero. D) Net displacement is non-zero, total distance covered is non-zero. Show Answer Correct Answer: B) Net displacement is zero, total distance covered is non-zero. 8. An object with a mass of 48 kg measured on Earth is taken to the Moon. What is the weight of the object on the Moon's surface if the acceleration due to gravity on Moon is one-sixth of that on Earth? A) 80 N. B) 48 N. C) 288 N. D) 8 N. Show Answer Correct Answer: A) 80 N. 9. A stone dropped from a building takes 4 s to reach the ground. The height of the building is A) 19.6 m. B) 80.4 m. C) 78.4 m. D) 156.8 m. Show Answer Correct Answer: C) 78.4 m. 10. The earth and the moon are attracted to each other by gravitational force. The earth attracts the moon with a force that is: A) More than that exerted by the moon. B) Same as that exerted by the moon. C) Less than that exerted by the moon. D) Not related to that exerted by the moon. Show Answer Correct Answer: B) Same as that exerted by the moon. 11. If the distance between two objects is tripled, what happens to the gravitational force between them? A) Becomes 9 times smaller. B) Becomes 3 times smaller. C) Becomes 3 times larger. D) Becomes 9 times larger. Show Answer Correct Answer: A) Becomes 9 times smaller. 12. When the distance between two objects is doubled, in terms of $F_g, $ A) $2F_g$. B) $4F_g$. C) $\frac{1}{2}F_g$. D) $\frac{1}{4}F_g$. Show Answer Correct Answer: D) $\frac{1}{4}F_g$. 13. A planet moves ..... when it is farthest from the sun. A) Faster. B) Slower. C) All the above. D) None of the above. Show Answer Correct Answer: B) Slower. 14. Two particles are placed at some distance. If the mass of each of the two particles is tripped, keeping the distance between them unchanged, the value of gravitational force between them will be A) 1/9 times. B) 9 times. C) 6 times. D) 1/6 times. Show Answer Correct Answer: B) 9 times. 15. MASS PROTON IS ..... A) EQUAL TO ELECTRON. B) ATOM. C) NEUTRON. D) NONE OF THESE. Show Answer Correct Answer: C) NEUTRON. 16. A ball is thrown upward with an initial speed of 16 m/s. At what height will its speed reduce to 8 m/s?(Assume g=10 m/s2) A) 4.8 m. B) 7.2 m. C) 9.6 m. D) 12.8 m. Show Answer Correct Answer: C) 9.6 m. 17. Explain Kepler's Third Law in terms of orbital periods and distances. A) The distance of a planet from the sun is proportional to its orbital speed. B) The cube of a planet's orbital period is proportional to the square of its distance from the sun. C) The average distance from the sun has no effect on a planet's orbital period. D) The square of a planet's orbital period is proportional to the cube of its average distance from the sun. Show Answer Correct Answer: D) The square of a planet's orbital period is proportional to the cube of its average distance from the sun. 18. Two objects of different masses falling freely near the surface of moon would(a) have same velocities at any instant(b) have different accelerations(c) experience forces of same magnitude(d) undergo a change in their inertia A) A. B) B. C) C. D) D. Show Answer Correct Answer: A) A. 19. Kepler's first law states that the planets move in circular orbits, with the Sun at the center A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 20. What is the force that causes objects to fall or orbit in curved paths? A) Gravitational force. B) Electromagnetic force. C) Frictional force. D) Tension force. Show Answer Correct Answer: A) Gravitational force. 21. The units for gravitational field strength are ..... A) Newtons per kilogram, N/kg. B) Joules, J. C) Degrees celsius, $^{o}$C. D) Kilograms, kg. Show Answer Correct Answer: A) Newtons per kilogram, N/kg. 22. During a journey from the earth to the moon and back, maximum fuel is spent to overcome the earth's gravity at take off. Reason:Earth's mass is much greater than that of the moon. A) Both assertion and reason are true and reason is the correct explanation of assertion. B) Both assertion and reason are true but reason is not the correct explanation of assertion. C) Assertion is true but reason is false. D) Both Assertion and Reason are false. Show Answer Correct Answer: A) Both assertion and reason are true and reason is the correct explanation of assertion. 23. A satellite orbits Earth at a distance where the gravitational force is $F$ A) $F/2$. B) $F/4$. C) $F/8$. D) $F/16$. Show Answer Correct Answer: B) $F/4$. 24. What is centripetal force ..... A) Force that make the body move in straight with direction of acceleration. B) Force that make the body move in circular path with direction always towards the center of curvature. C) Force that make the body keep moving and keep stationary. D) None of the above. Show Answer Correct Answer: B) Force that make the body move in circular path with direction always towards the center of curvature. 25. The value of g on a planet is one-fourth that on Earth. The weight of a 40 kg object on this planet is: A) 40 N. B) 100 N. C) 400 N. D) 10 N. Show Answer Correct Answer: B) 100 N. ← 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 9Class 11 Physics (Part I) Chapter 6 Gravitation Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books