This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Physics Part I > 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 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the correct definition of gravitational field strength? A) The mass per unit weight. B) The weight of a small test mass. C) The force acting on a small test mass. D) The force per unit mass acting on a small test mass. Show Answer Correct Answer: D) The force per unit mass acting on a small test mass. 2. What is the effect of more distance between two objects on gravitational force? A) Remains the same. B) Increases. C) Decreases. D) Disappears. Show Answer Correct Answer: C) Decreases. 3. Total ennergy of the satellite is ..... the potential energy. A) One third. B) Equal to. C) Half. D) Double. Show Answer Correct Answer: C) Half. 4. Pressure inversely proportional to A) Area. B) Time. C) Weight. D) Volume. Show Answer Correct Answer: A) Area. 5. If the original gravitational force between two objects is 100 N and the distance between them doubles, what would the new force be? A) 25 N. B) 200 N. C) 100 N. D) 50 N. Show Answer Correct Answer: A) 25 N. 6. A meteor follows an elliptical orbit around the Sun. When does the meteor sweep through the greatest area in time t? A) When it is closest to the Sun. B) When it is furthest from the Sun. C) It is impossible for the meteor to maintain an elliptical orbit therefore the question is not valid. D) The meteor sweeps through equal areas in the same amount of time anywhere in the orbit. E) None of the above. Show Answer Correct Answer: D) The meteor sweeps through equal areas in the same amount of time anywhere in the orbit. 7. Halving the distance between two objects ..... A) Will half the force of gravity. B) Will quadruple the force of gravity. C) Will quarter the force of gravity. D) Will double the force of gravity. Show Answer Correct Answer: B) Will quadruple the force of gravity. 8. A coin was tossed vertically upward at a speed of 10.0 m/s from the ground. (c) How long was the coin airborne? A) 2.04 s. B) 2.07 s. C) 2.10 s. D) 2.01 s. Show Answer Correct Answer: A) 2.04 s. 9. A satellite orbits Earth at a distance where the gravitational force is one fourth of that at the surface. What is the distance from the center of the Earth to the satellite? A) 2 Earth radii. B) 3 Earth radii. C) 1 Earth radius. D) 4 Earth radii. Show Answer Correct Answer: A) 2 Earth radii. 10. What is the psychological illusion of heaviness called? A) Gravitational Field. B) Actual Weight. C) Apparent Weight. D) Inverse Square Law. Show Answer Correct Answer: C) Apparent Weight. 11. Isaac Newton's universal law of gravitation A) Showed how one law could explain all motion in the universe. B) Was denounced by the Anglican Church as work of the Devil. C) Was laughed at by Galileo, Kepler, & Copernicus. D) Refuted Galileo Galilei's theory of universal movement. Show Answer Correct Answer: A) Showed how one law could explain all motion in the universe. 12. Why would you weigh less on the moon? A) There is no water on the moon. B) Less air. C) Less sunlight. D) Less gravitational pull. Show Answer Correct Answer: D) Less gravitational pull. 13. The model of the solar system where Earth is at the center of the solar system and the sun and all the planets orbit around it; this is also called the geocentric model A) Ptolemaic model. B) The heliocentric model, where the sun is at the center and the planets orbit around it. C) The heliostatic model, where the planets orbit around the sun and the Earth is stationary. D) The Copernican model, where the planets orbit around the sun in a circular motion. Show Answer Correct Answer: A) Ptolemaic model. 14. On the earth, a stone is thrown from a height in a direction parallel to the earth's surface while another stone is simultaneously dropped from the same height. Which stone would reach the ground first and why? A) Free fall will reach first. B) Body with horizontal motion reach first. C) Both will reach at same time. D) Never reach ground. Show Answer Correct Answer: C) Both will reach at same time. 15. Ocean tides occur mainly because A) Water normally runs to the side of Earth away from the sun. B) Of the gravitational pull of the sun on Earth. C) Of different gravitational pulls of the moon on opposite sides of Earth. D) As Earth rotates it leaves the ocean water somewhat behind it. Show Answer Correct Answer: C) Of different gravitational pulls of the moon on opposite sides of Earth. 16. State the definition of Gravitational field strength A) Gravitational force per unit time acting on a body at a point in a gravitational field. B) The force between two bodies of mass M and m is directly proportional to the product of their masses. C) Gravitational force per unit mass acting on a body at a point in a gravitational field. D) None of the above. Show Answer Correct Answer: C) Gravitational force per unit mass acting on a body at a point in a gravitational field. 17. A person weighing 785 newtons on the surface of Earth would weigh 298 newtons on the surface of Mars. What is the magnitude of the gravitational field strength on the surface of Mars? A) 2.63 N/kg. B) 3.72 N/kg. C) 6.09 N/kg. D) 9.81 N/kg. Show Answer Correct Answer: B) 3.72 N/kg. 18. What is scientific notation used for? A) Conveying really small or large numbers in a compact way. B) Conveying numbers between 1 and 9. C) Conveying numbers with only one significant figure. D) Conveying numbers with a decimal. Show Answer Correct Answer: A) Conveying really small or large numbers in a compact way. 19. Why does a block of plastic released under water come up to the surface of water? A) Because the block is denser than water. B) Because the block is lighter than water. C) Because of the buoyant force exerted by the water. D) Because of the gravitational force exerted by the earth. Show Answer Correct Answer: C) Because of the buoyant force exerted by the water. 20. If you double the mass of an object, how will the gravity force it exerts on other objects be affected? A) Gravity force will not be affected. B) Gravity force will be 1/2 as much. C) Gravity force will double. D) Gravity force will be 1/4 as much. Show Answer Correct Answer: C) Gravity force will double. 21. If the original gravitational force between two objects is 100 N and the distance between them is cut in half, what would the new force be? A) 25 N. B) 100 N. C) 400 N. D) 200 N. Show Answer Correct Answer: C) 400 N. 22. The relation F = GM mld$^{2}$, the quantity G is ..... A) Is used only when the Earth is one of the two masses. B) Is universal constant of nature. C) Depends on the value of g at the place of observation. D) Is greatest at the surface of the Earth. Show Answer Correct Answer: B) Is universal constant of nature. 23. What keeps the planets in orbit around the sun? A) Distance. B) Gravity. C) Density. D) Friction. Show Answer Correct Answer: B) Gravity. 24. Which would have the LEAST gravitational potential energy (GPE)? A) A ball sitting on the ground. B) Moon viewed from the Earth. C) An airplane flying 30, 000 feet above the ground. D) A rock sitting on top of Mt. Everest. Show Answer Correct Answer: A) A ball sitting on the ground. 25. If this vertical velocity is less that theescape velocity, the satellite ..... A) Revolves in a circular orbit around the earth. B) Experience a parabolic path. C) Returns to the Earth's surface. D) Escape the gravitational field. Show Answer Correct Answer: C) Returns to the Earth's surface. 26. What is the gravitational force between two 1 kg masses that are 1 meter apart? (Use $G = 6.67 \times 10^{-11} \, \text{N m}^2 \text{kg}^{-2}$ A) $6.67 \times 10^{-11} \, \text{N}$. B) $3.34 \times 10^{-11} \, \text{N}$. C) $9.81 \times 10^{-11} \, \text{N}$. D) $1.67 \times 10^{-11} \, \text{N}$. Show Answer Correct Answer: A) $6.67 \times 10^{-11} \, \text{N}$. 27. Which of the following is true about geostationary satellite? I It moves in the direction of the earth orbit. II Its period of rotation is 24 hours. III Its orbit is always above the same geographical location. IV It does not experience any gravitational pull. A) I, II and III only. B) I and III only. C) II and IV only. D) I, II, III and IV. Show Answer Correct Answer: A) I, II and III only. 28. Why do astronauts in space appear weightless? A) There is no gravity in space. B) Air resistance opposes gravity. C) They have no mass in space. D) They are in free fall. Show Answer Correct Answer: D) They are in free fall. 29. What keeps an Earth satellite moving in its orbit? A) A Gravitational attraction of Sun. B) Burning of fuel. C) Ejection of gases from the exhaust of the satellite. D) Gravitational attraction between satellite and Earth. Show Answer Correct Answer: D) Gravitational attraction between satellite and Earth. 30. Two point of masses, each of mass 100 kg are separated by a distance of 0.5m. The force acting between them is $\left(G=6.67\times10^{-11}\frac{N.m^2}{kg^2}\right)$ A) Attractive force of $2.66\times10^{-6}N$. B) Repulsive force of $2.66\times10^{-6}N$. C) Repulsive force of $1.33\times10^{-6}N$. D) Attractive force of $1.33\times10^{-6}N$. Show Answer Correct Answer: A) Attractive force of $2.66\times10^{-6}N$. 31. Value of 'G' is directly proportional to A) Mass of the object. B) Radius of the planet. C) Velocity of the planet. D) Nothing. E) Mass of the planet. Show Answer Correct Answer: D) Nothing. 32. States that gravitational force between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. A) Eccentricity. B) Ptolemaic model. C) Newton's universal law of gravitation. D) Copernican model. Show Answer Correct Answer: C) Newton's universal law of gravitation. 33. Calculate the gravitational force of attraction between a 1, 819-kg car and a 10, 200-kg truck, separated by a distance of 0.25 m. A) 6.4 x 10$^{-3}$ N. B) 2 x 10$^{-2}$ N. C) 5 x 10$^{-4}$ N. D) 2 x 10$^{2}$ N. E) 9 x 10$^{-5}$ N. Show Answer Correct Answer: B) 2 x 10$^{-2}$ N. 34. When farther away from the sun, planets travel A) Faster. B) Slower. C) At the same speed as if closer to the sun. D) None of the above. Show Answer Correct Answer: B) Slower. 35. Weight of an object is the force with which it is attracted towards the ..... A) G. B) MOON. C) EARTH. D) G. Show Answer Correct Answer: C) EARTH. 36. How is the period of circular motion defined? A) Time taken to complete half a circle. B) Time taken to stop. C) Time taken to reach maximum speed. D) Time taken to complete one full circle. Show Answer Correct Answer: D) Time taken to complete one full circle. 37. WHICH ONE IS NOT RELATED TO ARCHIMEDES PRINCIPLE SONAR A) HYDROMETER. B) LACTOMETER. C) SHIPS. D) SONAR. Show Answer Correct Answer: D) SONAR. 38. What is the actual weight of an object? A) The gravitational force acting upon a body caused by a planet or star. B) The psychological illusion and heaviness feeling of an object. C) The weight calculated by mass times the gravitational field. D) The weight calculated by mass times the acceleration. Show Answer Correct Answer: C) The weight calculated by mass times the gravitational field. 39. How does the concept of gravitational field strength relate to weight? A) Weight is independent of gravitational field strength. B) Weight is the product of mass and gravitational field strength. C) Gravitational field strength is the same everywhere on Earth. D) Weight is the same as mass regardless of location. Show Answer Correct Answer: B) Weight is the product of mass and gravitational field strength. 40. Assertion:Universal gravitational constant G is a scalar quantity. Reason:The value of G is same through out the universe. 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. 41. Two satellites A and B of the same mass m are at distances 2R$_{e}$ and 6R$_{e}$, above the earths surface where R$_{e}$ = radius of earth. The ratio of potential energy of A to that of B is A) 3. B) 7/4. C) 3/7. D) 7/3. Show Answer Correct Answer: D) 7/3. 42. What is the force that balances the gravitational attraction force in Henry Cavendish's experiment? A) Torsional force. B) Spring force. C) Centripetal force. D) Frictional force. Show Answer Correct Answer: A) Torsional force. 43. Does the mass of an object affect the gravitational force between two objects? A) Yes, the mass of both objects affects the force. B) No, the mass of an object has no effect on the force. C) Yes, only the mass of the first object affects the force. D) Yes, only the mass of the second object affects the force. Show Answer Correct Answer: A) Yes, the mass of both objects affects the force. 44. Which of the following is the minimum amount of work done by a hydraulic lift to raise a 150-kg aluminum block 2.0 m vertically? A) 300 N*m (J). B) 75 N*m (J). C) 1500 N-m (J). D) 2940 N*m (J). Show Answer Correct Answer: D) 2940 N*m (J). 45. What is the easiest way to demonstrate the effect of gravitational force? A) Suspend a horizontal scale with two masses. B) Drop two large masses from a height. C) Push two small masses towards each other. D) Place two large masses on a scale. Show Answer Correct Answer: A) Suspend a horizontal scale with two masses. 46. Why do astronauts feel weightless in space? A) Due to air resistance. B) Due to the lack of gravity. C) Due to the lack of oxygen. D) Due to differences in mass. Show Answer Correct Answer: B) Due to the lack of gravity. 47. Day and night are caused by ..... A) Earth's revolution. B) Moon's rotation. C) Moon's revolution. D) Earth's rotation. Show Answer Correct Answer: D) Earth's rotation. 48. Geostationary satellites revolve around the Earth: A) In a highly elliptical orbit. B) In an equatorial orbit. C) In a polar orbit. D) In any orbit. Show Answer Correct Answer: B) In an equatorial orbit. 49. Two objects with mass are separated a distance of r. if the mass of one doubles, the force of gravity between them A) Does not change. B) Doubles. C) Triples. D) Gets cut in half. Show Answer Correct Answer: B) Doubles. 50. Every object with mass is gravitationally attracted to each other object with mass in the entire universe. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 51. If two objects increase their distance, it ..... the gravitational pull between the two objects A) Decreases. B) Increases. C) Has no effect on. D) Eliminates. Show Answer Correct Answer: A) Decreases. 52. The gravitational force A) Is tangential to the orbital path. B) Can be attractive or repulsive. C) Is always attractive. D) Is always repulsive. Show Answer Correct Answer: C) Is always attractive. 53. According to Kepler's laws, an imaginary line from the Sun to a planet A) Sweeps out equal areas in equal time periods. B) Remains a constant length through the entire orbit of that planet. C) Sweeps out larger areas when the planet is closest to the Sun than it would in the same time interval when farthest from the Sun. D) Sweeps out larger areas the greater the planet's distance from the Sun than it would in the same time interval when closest to the Sun. Show Answer Correct Answer: A) Sweeps out equal areas in equal time periods. 54. Gravitational potential energy at the surface of Earth is A) Zero. B) Negative. C) Infinite. D) Positive. Show Answer Correct Answer: B) Negative. 55. The forces of gravity ..... with altitude. A) Increases. B) Decreases. C) All the above. D) None of the above. Show Answer Correct Answer: B) Decreases. 56. The proportionality constant in Newton's law of universal gravitation A) The speed of light. B) The Coulomb constant. C) The Planck constant. D) Gravitational constant. Show Answer Correct Answer: D) Gravitational constant. 57. Which of the following best describes the concept of gravitational force according to Newton's Law of Gravitation? A) It is a force that acts between any two masses. B) It is a force that acts only on objects with a charge. C) It is a force that acts only on objects in motion. D) It is a force that acts only at the surface of the Earth. Show Answer Correct Answer: A) It is a force that acts between any two masses. 58. An artificial satellite moving in a circular orbit around the earth has a total (kinetic + potential) energy Eo. Its potential energy is: A) -E$_{0}$. B) 1.5 E$_{0}$. C) E$_{0}$. D) 2E$_{0}$. Show Answer Correct Answer: D) 2E$_{0}$. 59. Which of the following is the evidence to show that there must be a force acting on earth and directed towards the sun: A) Deviation of the falling bodies towards east. B) Revolution of earth around the sun. C) Phenomena of day and night. D) Apparent motion of sun round the earth. Show Answer Correct Answer: B) Revolution of earth around the sun. 60. Planets move faster when they are closer to the Sun and slower when they are farther away A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. ← PreviousNext →Related QuizzesScience QuizzesClass 11 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 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books