This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Physics Part I > Class 11 Physics (Part I) Chapter 6 Gravitation – Quiz 8 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part I) Chapter 6 Gravitation Quiz 8 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the gravitational potential energy (GPE) of a 1 kilogram book that is 1 meter above the ground? g = 9.8 m/s$^{2}$ A) 0.10 Joule. B) 9.8 Joules. C) 1.0 Joule. D) 11.8 m/s$^{2}$. Show Answer Correct Answer: B) 9.8 Joules. 2. Gravity on moon is less than the gravity on earth because A) Moon's mass is equal to Earth. B) Moon has no mass. C) Moon's mass is more. D) Moon's mass is less. Show Answer Correct Answer: D) Moon's mass is less. 3. Planets remain in orbit while falling around the sun due to their A) Tangential velocities. B) Centrifugal forces that keep them up. C) Accelerations of about 10 m/s2. D) Zero tangential velocities. Show Answer Correct Answer: A) Tangential velocities. 4. An object is thrown upward from the top of a 30 m high cliff with an initial speed of 10 m/s. Using g=10 m/s2, find the total time taken for the object to hit the ground. A) 2.65 s. B) 3.65 s. C) 4.0 s. D) 3.0 s. Show Answer Correct Answer: B) 3.65 s. 5. Mercury is the closest planet to the sun and has a mass of 3.30 x 10$^{24 }$kg. The sun has a mass of 1.99 x 10$^{30 }$kg. Mercury is 5.79 x 10$^{10}$ m away from the sun. What is the gravitation force between them? A) 3.37 x 10$^{25}$ N. B) 4.12 x 10$^{27}$ N. C) 1.31 x 10$^{23}$ N. D) 2.59 x 10$^{33}$ N. Show Answer Correct Answer: C) 1.31 x 10$^{23}$ N. 6. What role does gravity play in the formation of planets and stars? A) Gravity has no effect on the formation of celestial bodies. B) Gravity prevents the formation of matter in space. C) Gravity is essential for the accumulation of matter, leading to the formation of stars and planets. D) Gravity only influences the orbits of existing planets and stars. Show Answer Correct Answer: C) Gravity is essential for the accumulation of matter, leading to the formation of stars and planets. 7. Luke Skywalker has a mass of 13 kg and weight of 127.4 N on earth. Find his weight on the Endor moon. Acceleration due to gravity of 2 m/s/s. A) 127.4 kg. B) 254.8 N. C) 13 kg. D) 26 N. Show Answer Correct Answer: D) 26 N. 8. Two asteroids exert a gravitational force, F, on each other. Some time later, the asteroids are now 9 times as far from each other as before. Which of the following represents the gravitational force at this distance? A) F/4.5. B) F/9. C) F/3. D) F/81. Show Answer Correct Answer: D) F/81. 9. A heavy cylinder of length l is slowly taken out of a dense liquid. The weight felt as it is taken out of the liquid A) Increases till it attains the weight in air. B) Increases as it comes out. C) Will remain the same. D) Decreases as it comes out. Show Answer Correct Answer: A) Increases till it attains the weight in air. 10. If you double the mass of one object, what happens to the gravity between two objects? A) It triples the force. B) It doubles the force. C) It quadruples the force. D) The does not change. Show Answer Correct Answer: B) It doubles the force. 11. The gravitational force between two bodies A) Is always repulsive. B) Is inversely proportional to the distance between two bodies. C) Is always attractive. D) Is directly proportional to the distance between two bodies. Show Answer Correct Answer: C) Is always attractive. 12. Which real-world application relies on the principles of gravitation? A) Electric circuits. B) Satellite orbits. C) Chemical reactions. D) Photosynthesis. Show Answer Correct Answer: B) Satellite orbits. 13. If the Earth shrinks to half of its radius with mass remaining the same, the weight of an object on the Earth will A) Decrease 2 times. B) Increase 2 times. C) Increase 4 times. D) Decrease 4 times. Show Answer Correct Answer: C) Increase 4 times. 14. If the distance between two objects is doubled, what happens to the gravitational force between them? A) It halves. B) It doubles. C) It becomes one-fourth. D) It remains the same. Show Answer Correct Answer: C) It becomes one-fourth. 15. What is the gravitational force between two 10 kilogram balls that are 5 meters apart from each other? A) $8.778\times10^{23}\\\frac{n}{kg}$. B) $5.56\times10^2\\frac{n}{kg}$. C) $2.668\times10^{-10}\\frac{n}{kg}$. D) $1.5\times10^{-7}\\frac{n}{kg}$. Show Answer Correct Answer: C) $2.668\times10^{-10}\\frac{n}{kg}$. 16. A body weighs 64 N on the surface of the earth. What is the gravitational force on the body due to earth at a height equal to one-third the radius of earth? A) 48 N. B) 24 N. C) 36 N. D) 12 N. Show Answer Correct Answer: C) 36 N. 17. A satellite travels around the Earth in a circular orbit. What is true about the forces acting in this situation? A) There is no resultant force on the satellite relative to the Earth. B) The satellite does not exert any force on the Earth. C) The gravitational force acting on the satellite is negligible. D) The resultant force is the same direction as the satellite's acceleration. Show Answer Correct Answer: D) The resultant force is the same direction as the satellite's acceleration. 18. Which of the following scenarios will result in the smallest gravitational force between two objects? A) Large masses close together. B) Small masses far apart. C) Large masses far apart. D) Small masses close together. Show Answer Correct Answer: B) Small masses far apart. 19. What are some practical applications of gravitational principles in technology? A) Applications include satellite positioning systems, structural engineering, and aerospace trajectory calculations. B) Underwater exploration devices. C) Television broadcasting technology. D) Weather forecasting systems. Show Answer Correct Answer: A) Applications include satellite positioning systems, structural engineering, and aerospace trajectory calculations. 20. Planets are moving around the Sun in A) Elliptical orbits. B) Circular orbits. C) Parabolic. D) None of these. Show Answer Correct Answer: A) Elliptical orbits. 21. Three laws derived by Johannes Kepler that describe the properties of all orbiting satellites A) Kepler's laws of planetary motion. B) All orbiting satellites must have a circular orbit. C) All orbiting satellites must have a constant speed. D) All orbiting satellites must have the same orbital period. Show Answer Correct Answer: A) Kepler's laws of planetary motion. 22. A body is taken from the moon to the Earth.Which is correct? A) Weight increases. B) Weight decreases. C) Mass increases. D) Mass decreases. Show Answer Correct Answer: A) Weight increases. 23. What did Sir Isaac Newton observe that led to the discovery of the universal law of gravitation? A) An apple falling from a tree. B) Two apples falling from different trees. C) Objects falling radially towards the Earth. D) The Earth attracting the Moon. Show Answer Correct Answer: A) An apple falling from a tree. 24. What is true of a bar magnet? A) The poles are the strongest. B) There are two north poles. C) The poles are the weakest. D) There are 2 south poles. Show Answer Correct Answer: A) The poles are the strongest. 25. Find the acceleration due to gravity on the surface of the moon if the mass of the moon is $\frac{1}{80}$ $\frac{1}{4}$ $s^2$ A) 3.92 m/ $s^2$. B) 1.96 m/ $s^2$. C) 20.4 m/ $s^2$. D) 9.8 m/ $s^2$. Show Answer Correct Answer: B) 1.96 m/ $s^2$. 26. When an object is thrown vertically upward, on reaching the highest point, the value of acceleration due to gravity will be A) 9.8 m/s$^{2}$ upwards. B) 4.9 m/s$^{2}$. C) 0 m/s$^{2}$. D) 9.8 m/s$^{2}$ towards the ground. Show Answer Correct Answer: D) 9.8 m/s$^{2}$ towards the ground. 27. An object weighs 10 N in air. When immersed fully in water, it weighs only 8 N. The weight of the liquid displaced by the object will be A) 12 N. B) 2 N. C) 8 N. D) 10 N. Show Answer Correct Answer: B) 2 N. 28. Newton's law of gravitation applies to A) Small bodies only. B) Plants only. C) All bodies irrespective of their size. D) For solar system. Show Answer Correct Answer: C) All bodies irrespective of their size. 29. Gravitational force is another name for gravity. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 30. According to Kepler's 3rd law of planetary motion ..... ? = Constant A) "Distance from sun" cubed upon "orbital time" squared. B) Area swept by the "line joining planets and sun" in "equal time intervals". C) Value of G. D) Mass of an object. Show Answer Correct Answer: A) "Distance from sun" cubed upon "orbital time" squared. 31. How could you increase the object's gravitational potential energy (GPE) without changing its distance from the ground (height) and gravity? A) Increase the object's height. B) Decrease the object's height. C) Increase the object's mass. D) Decrease the object's mass. Show Answer Correct Answer: C) Increase the object's mass. 32. UNIVERSAL LAW EXPLAINED SUCCESSFULLY A) THE FORCE BINDS THE EARTH. B) THE MOTION OF THE MOON ROUND THE EARTH. C) BUOYANCY. D) THE TIDES DUE TO THE MOON AND SUN. Show Answer Correct Answer: C) BUOYANCY. 33. A ball is thrown downward from a height of 20 m with an initial speed of 5 m/s. Using g=10 m/s2 what is its speed just before hitting the ground? A) 15 m/s. B) 20.6 m/s. C) 20 m/s. D) 25 m/s. Show Answer Correct Answer: B) 20.6 m/s. 34. The earth revolves around the sun in one year. If the distance between them becomes double, the new period of revolution will be A) 4 years. B) $2\sqrt{2}years$. C) 8 years. D) $\frac{1}{2}years$. Show Answer Correct Answer: B) $2\sqrt{2}years$. 35. Satellites orbiting the earth have finite life and sometimes debris of satellites fall to the earth. This is because: A) The solar cells and batteries in satellites run out. B) The laws of gravitation predict a trajectory spiraling inwards. C) Of viscous forces causing the speed of satellite and hence height to gradually decrease. D) Of collisions with other satellites. Show Answer Correct Answer: C) Of viscous forces causing the speed of satellite and hence height to gradually decrease. 36. The units of velocity are A) M/s. B) Kg. C) N. D) M. Show Answer Correct Answer: A) M/s. 37. Doubling the distance between two objects ..... A) Will quarter the force of gravity. B) Will double the force of gravity. C) Will half the force of gravity. D) Will quadruple the force of gravity. Show Answer Correct Answer: A) Will quarter the force of gravity. 38. Jackson, Aria, and Hannah are observing a dropped apple in their physics class. According to the universal law of gravitation, how does the apple fall towards the Earth? A) In a radial direction. B) In a straight line. C) In a circular motion. D) In a random pattern. Show Answer Correct Answer: A) In a radial direction. 39. A ball is thrown 180m in upward direction. Find the velocity by which it is thrown. ( Let g = 10m/s ) A) 40m/s. B) 90m/s. C) 30m/s. D) 60m/s. Show Answer Correct Answer: D) 60m/s. 40. What shape is the path of a planet that surround the Sun? A) Circle. B) Ellipse. C) Focus. D) Perihelion. Show Answer Correct Answer: B) Ellipse. 41. What is buoyant force? A) An upward force exerted by fluids on an object. B) An downward force exerted by fluids on an object. C) All the above. D) None of the above. Show Answer Correct Answer: A) An upward force exerted by fluids on an object. 42. Jimmy Donaldson weighs 420N. Find his mass on the earth and on the moon. (g = $10ms^{-2}$ A) 42kg, 42kg. B) 44 kg, 98kg. C) 42kg, 7kg. D) 42 kg, 34kg. Show Answer Correct Answer: A) 42kg, 42kg. 43. What happens to the volume of a substance if its density is less than that of water? A) The volume remains the same. B) The volume increases. C) The substance sinks in water. D) The substance floats on water. Show Answer Correct Answer: D) The substance floats on water. 44. An empty closed drum and a filled drum of same dimension will bring A) Same upthrust. B) Same volume. C) Both (a) and (b). D) Neither (a) nor (b). Show Answer Correct Answer: C) Both (a) and (b). 45. How does gravitational force affect the motion of satellites? A) Gravitational force has no effect on satellite motion. B) Gravitational force causes satellites to fall to Earth. C) Gravitational force keeps satellites in orbit by providing the necessary centripetal force. D) Satellites move faster when gravitational force is weaker. Show Answer Correct Answer: C) Gravitational force keeps satellites in orbit by providing the necessary centripetal force. 46. The force of gravity (mass x gravity) is also known as ..... A) Distance. B) Acceleration. C) Mass. D) Weight. Show Answer Correct Answer: D) Weight. 47. If the two masses of two objects are doubled, the force of gravitational attraction between them ..... A) Doubles. B) Quadruples. C) Cut in Half. D) 4x Smaller. Show Answer Correct Answer: A) Doubles. 48. The satellite used to observe the entire surface of earth is A) Synchronous satellite. B) Polar satellite. C) Both the above. D) None of the above. Show Answer Correct Answer: B) Polar satellite. 49. Choose the factor on which the orbital velocity does not depend when the satellite is orbiting close to the earth's surface: A) The orbital radius. B) The radius of the earth. C) The mass of the satellite. D) The mass of the earth. Show Answer Correct Answer: C) The mass of the satellite. 50. According to the Newton's Universal Law of Gravitation, the force of gravity between two objects is inversely proportional to A) The distance between the objects. B) The square of the distance between the objects. C) The gravitational constant. D) The product of the masses of the objects. Show Answer Correct Answer: B) The square of the distance between the objects. 51. Period of revolution of polar satellite is Nearly ..... A) 27 hours. B) 85 Min. C) 1 day. D) 80 min. Show Answer Correct Answer: B) 85 Min. 52. An apple is hangs on a tree on the earth, Which of the following statements is correct about the interaction between the apple and the earth? A) The force on the apple is greater that the force on the Earth. B) The force on the apple is equal to the force on the earth. C) The force on the Earth is larger than the force on the apple. D) The forces on the apple and the earth are zero because they are not touching each other. Show Answer Correct Answer: B) The force on the apple is equal to the force on the earth. 53. Newton found that the gravitational force between two masses is inversely proportional to the square of ..... A) The strength of the gravitational field. B) The product of the masses. C) The distance between them. D) The sum of the masses. Show Answer Correct Answer: C) The distance between them. 54. The planets in the Solar System revolve around the Sun because the Sun is A) The source of most heat and light energy. B) The strongest source of gravity in the solar system. C) Older than other objects in the solar system. D) Made of hydrogen and helium. Show Answer Correct Answer: B) The strongest source of gravity in the solar system. 55. Two spherical objects have masses of 100 kg and 50 kg. Their centers are separated by a radius distance of 10 m. Find the change in the gravitational attraction Force between them if only the radius distance increases to 20 m in length. A) It does not change the overall force of gravitation. B) It increases by a factor of 2 times stronger. C) It decreases by a factor of 1/4 as weak. D) It increases by a factor of 4 times stronger. Show Answer Correct Answer: C) It decreases by a factor of 1/4 as weak. 56. The mass of the moon is about 1.2% of the mass of the earth. Compared to the gravitational force the earth exerts on the moon, the gravitational force the moon exerts on earth: A) Is the same. B) Is smaller. C) Is greater. D) Varies with its phase. Show Answer Correct Answer: A) Is the same. 57. A satellite orbits Earth at an altitude of 400 km above the planet's surface. What is its linear speed in m s$^{-1}$?Round your answer to three significant digits. Given G = 6.67x10$^{-11}$ N m$^{2}$ kg$^{-2}$. A) 7860 ms$^{-1}$. B) 7680 ms$^{-1}$. C) 7670 ms$^{-1}$. D) 7760 ms$^{-1}$. Show Answer Correct Answer: C) 7670 ms$^{-1}$. 58. Doctor uses ..... thermometer A) Clinical. B) Laboratory. C) Chemical. D) None. Show Answer Correct Answer: A) Clinical. 59. The formula for Coulomb's Law:F= k (q$_{1}$ x q$_{2}$)/r$^{2}$, the q represents: A) Coulomb's constant. B) Distance between charges. C) Electric charge. D) Electrostatic force. Show Answer Correct Answer: C) Electric charge. 60. The first scientist who construct a reflecting telescope ..... A) Einstein. B) Newton. C) All the above. D) None of the above. Show Answer Correct Answer: B) Newton. ← 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 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books