This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Physics Part I > Class 11 Physics (Part I) Chapter 6 Gravitation – Quiz 4 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part I) Chapter 6 Gravitation Quiz 4 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. If a satellite of Earth is stopped suddenly in its orbit at a height equal to radius of Earth and is allowed to fall intoEarth's surface, with what speed will it hit the surface of Earth? A) 7.92 km s$^{-1}$. B) 8.92 km s$^{-1}$. C) 5.6 km s$^{-1}$. D) 11.2 km s$^{-1}$. Show Answer Correct Answer: A) 7.92 km s$^{-1}$. 2. Why does the Moon not have an atmosphere? A) Due to high temperature. B) Due to low escape velocity. C) Due to low mass. D) Due to high gravity. Show Answer Correct Answer: B) Due to low escape velocity. 3. Two balls have their centers 2.0 m apart. One has a mass of 8.0 kg. The other has a mass of 6.0 kg. What is the gravitational force between them? $Fg=\frac{Gm_1m_2}{d^2}$ A) $1.6\times10^{-9}$. B) 160.08 Newtons. C) $8.0\times10^{-10}$. D) 24 Newtons. Show Answer Correct Answer: C) $8.0\times10^{-10}$. 4. What two things determine the gravity of an object? A) Density & mass. B) Volume & distance. C) Mass & distance. D) Mass & weight. Show Answer Correct Answer: C) Mass & distance. 5. What is the primary factor that determines the shape of a planet's orbit according to Kepler's first law? A) The planet's mass. B) The planet's speed. C) The gravitational pull of the Sun. D) The distance from the Sun. Show Answer Correct Answer: C) The gravitational pull of the Sun. 6. While studying in the park, Scarlett observed something that reminded her of Sir Isaac Newton's discovery of the universal law of gravitation. What did she observe? A) An apple falling from a tree. B) Two apples falling from different trees at the same time. C) Objects falling radially towards the Earth. D) Evelyn throwing a ball and it being attracted towards the Earth. Show Answer Correct Answer: A) An apple falling from a tree. 7. A particle is droped from a tower 180m high . How long does it take to reach the ground A) 4s. B) 3s. C) 5s. D) 6s. Show Answer Correct Answer: D) 6s. 8. Which of the following best describes the relationship between a planet's orbital period and its distance from the Sun? A) The closer a planet is to the Sun, the longer its orbital period. B) The farther a planet is from the Sun, the shorter its orbital period. C) The distance from the Sun does not affect the orbital period.TagsDOK Level 2:Skill/Concept. D) The closer a planet is to the Sun, the shorter its orbital period. Show Answer Correct Answer: D) The closer a planet is to the Sun, the shorter its orbital period. 9. The reason why ocean tides happen is A) Electrical forces between the sun and the moon. B) Gravitational forces between the Earth and the moon. C) Magnetic forces between the Earth and the moon. D) Motion of the moon around the earth. Show Answer Correct Answer: B) Gravitational forces between the Earth and the moon. 10. Kepler discovered A) Laws of motion. B) Laws of rotational motion. C) Laws of planetary motion. D) Laws of curvilinear motion. Show Answer Correct Answer: C) Laws of planetary motion. 11. 'The orbit of a planet is an ellipse with the Sun at one of the foci" is Kepler's A) First law. B) Second law. C) Third Law. D) None of the above. Show Answer Correct Answer: A) First law. 12. Two objects each have masses of 4500 kg and are .03 meters apart from each other. What's their force of gravity? A) .3 N. B) 1.5 N. C) .7 N. D) 1.1 N. Show Answer Correct Answer: B) 1.5 N. 13. Find the distance between two objects whose masses are m$_{1}$ = 4, 500 kg, and m$_{2 }$= 8, 700 kg; if the gravitational force between them is F = 2.0 x 10$^{-8}$ N. A) 361.34 m. B) 0.783 m. C) 130565.25 m. D) 0.19575 m. Show Answer Correct Answer: A) 361.34 m. 14. AN OBJECT HAVING MASS EQUAL TO 350g OCCUPIES 200cm(cube) OF THE SPACE.WHEN THIS OBJECT IS THROWN INTO A RIVER WHAT WILL BE THE CONDITION OF THIS OBJECT THERE? 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. 15. 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. 16. Newton's law of gravitation A) Is used to make predictions. B) Is equivalent to Newton's second law of motion. C) Is not valid in a vacuum. D) Explains the origin of gravitation. Show Answer Correct Answer: A) Is used to make predictions. 17. The region around Earth in which objects experience a force due to Earth's gravity is called ..... A) Ozone. B) Atmosphere. C) Gravitational Field. D) Orbit. Show Answer Correct Answer: C) Gravitational Field. 18. 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. 19. A Polish astronomer, first proposed that Earth and the other planets move around the sun is named? A) Galileo. B) Ptolemy. C) Copernicus. D) Einstein. Show Answer Correct Answer: C) Copernicus. 20. Double the mass of an object, what happens to the force of attraction? A) 2 times weaker gravity force. B) 2 times stronger gravity force. C) 4 times stronger gravity force. D) 4 times weaker gravity force. Show Answer Correct Answer: B) 2 times stronger gravity force. 21. 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) 2 x 6.67 x 10$^{-11}$ N. D) 6.67 x 10$^{-11}$ N. Show Answer Correct Answer: A) 9.8 N. 22. 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) 9.8 m/s$^{2}$. C) 4.9 m/s$^{2}$. D) 19.6 m/s$^{2}$. E) 39.2 m/s$^{2}$. Show Answer Correct Answer: A) 2.45 m/s$^{2}$. 23. 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) 4GM$_{0}$/ D$_{0}$$^{2}$. B) GM$_{0}$/ 2D$_{0}$$^{2}$. C) 4GM$_{0}$/ 3D$_{0}$$^{2}$. D) GM$_{0}$/ D$_{0}$$^{2}$. Show Answer Correct Answer: A) 4GM$_{0}$/ D$_{0}$$^{2}$. 24. Compared to the gravitational field of Earth at its surface, Earth's gravitational field at a distance three times as far from Earth's center is about A) One half as much. B) One third as much. C) One ninth as much. D) .zero. Show Answer Correct Answer: C) One ninth as much. 25. If two objects are moved to a distance 3 x further than they were before. How would the gravity force between them change? A) It would be 9x larger. B) It would be 3x larger. C) It would be 1/3 as large. D) It would be 1/9 as large. Show Answer Correct Answer: D) It would be 1/9 as large. 26. What does Kepler's Second Law state about planetary motion? A) Planets move in circular orbits around the Sun. B) The speed of a planet is constant throughout its orbit. C) The distance between a planet and the Sun remains unchanged. D) A line joining a planet and the Sun sweeps out equal areas in equal times. Show Answer Correct Answer: D) A line joining a planet and the Sun sweeps out equal areas in equal times. 27. The formula for calculating gravitational potential energy is ..... A) Mass x gravitational field strength x height$^{2}$. B) 1/2 x mass x gravitational field strength x height. C) 1/2 x mass$^{2}$ x gravitational field strength x height. D) Mass x gravitational field strength x height. Show Answer Correct Answer: D) Mass x gravitational field strength x height. 28. If the distance between two objects is halved, how does the gravitational force between them change? A) It halves. B) It doubles. C) It quadruples. D) It remains the same. Show Answer Correct Answer: C) It quadruples. 29. 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. 30. The moon has no atmosphere because A) Its high orbital velocity. B) Escape velocity is greater than r.m.s. velocity of gas molecules. C) Escape velocity is less than r.m.s velocity of gas molecules. D) Of low temperature on its surface. Show Answer Correct Answer: C) Escape velocity is less than r.m.s velocity of gas molecules. 31. What happens to the force between two charged objects when you double the distance between them? A) 2X. B) 1/4X. C) 1/2X. D) 4X. Show Answer Correct Answer: B) 1/4X. 32. What is the proper setup of the gravitational force formula? A) F$_{g}$= G (m$_{1}$m$_{2}$)/r$^{2}$. B) F=ma. C) F$_{g}$= Gr$^{2}$/(m$_{1}$+m$_{2}$). D) F$_{g}$= Gm$^{2}$/r. Show Answer Correct Answer: A) F$_{g}$= G (m$_{1}$m$_{2}$)/r$^{2}$. 33. 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) $\frac{2}{5}\frac{GMm}{R}$. C) $\frac{GMm}{2R}$. D) $\frac{GMm}{5R}$. Show Answer Correct Answer: B) $\frac{2}{5}\frac{GMm}{R}$. 34. 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) $5.00 \times 10^{-8} \, \text{N}$. B) $2.50 \times 10^{-8} \, \text{N}$. C) $3.75 \times 10^{-8} \, \text{N}$. D) $1.25 \times 10^{-8} \, \text{N}$. Show Answer Correct Answer: D) $1.25 \times 10^{-8} \, \text{N}$. 35. Which quantity remains constant for all objects in free fall near the Earth's surface? A) Velocity. B) Acceleration due to gravity. C) Speed. D) Weight. Show Answer Correct Answer: B) Acceleration due to gravity. 36. This is considered to be a fictitious force? A) Torque. B) Universal Gravitation. C) Centrifugal. D) Centripetal. Show Answer Correct Answer: C) Centrifugal. 37. 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. 38. 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. 39. An object of mass m$_{1}$ is a distance r away from a mass of m$_{2}$. If m$_{1}$ is tripled and the distance between the two objects is increased from r to 3r, what is the new gravitational force? A) 3F. B) F/9. C) F. D) F/3. E) 9F. Show Answer Correct Answer: D) F/3. 40. To convert grams into kilograms ..... A) Multiply the grams by 100. B) Divide the grams by 1000. C) Multiply the grams by 1000. D) Divide the grams by 100. Show Answer Correct Answer: B) Divide the grams by 1000. 41. What does Kepler's second law imply about the speed of a planet as it moves in its orbit? A) The speed varies, being faster when closer to the Sun and slower when farther away. B) The speed is constant throughout the orbit. C) The speed is slower when closer to the Sun and faster when farther away. D) The speed is unrelated to its position in the orbit. Show Answer Correct Answer: A) The speed varies, being faster when closer to the Sun and slower when farther away. 42. If your mass on Earth is 73 kg, what is your mass on Mars? The force of gravity on Mars is $3.71\\frac{m}{s^2}$ A) 193 kg. B) 73 kg. C) 19.7 kg. D) 28 kg. Show Answer Correct Answer: B) 73 kg. 43. The gravitational forces between two objects is 500 Newtons. If both masses triples and the distance between them doubled, calculate the new gravitational forces. A) 250 N. B) 1500 N. C) 1125 N. D) 750 N. Show Answer Correct Answer: C) 1125 N. 44. What is the significance of Kepler's third law in understanding the motion of planets? A) It shows that the speed of a planet is constant throughout its orbit. B) It describes the shape of a planet's orbit as a perfect circle. C) It relates the orbital period of a planet to its distance from the Sun. D) It explains why planets have different masses. Show Answer Correct Answer: C) It relates the orbital period of a planet to its distance from the Sun. 45. The distance between the Earth and the moon is tripled, what happens to the Fg between them? A) 1/9 bigger. B) 3 times bigger. C) 1/3 bigger. D) 9 times bigger. Show Answer Correct Answer: A) 1/9 bigger. 46. The discovery of the "Universal Gravitation" is associated with: A) Isaac Newton. B) Robert Hook. C) James Joule. D) Albert Einstein. Show Answer Correct Answer: A) Isaac Newton. 47. Why doesn't the earth move towards the moon? A) Because the moon is much smaller than the earth. B) Because the moon is moving in a circular orbit around the earth. C) Because the force of gravity between the earth and the moon is very weak. D) Because the earth and the moon are at a constant distance from each other. Show Answer Correct Answer: B) Because the moon is moving in a circular orbit around the earth. 48. The gravitational force exerted by an object depends on its A) Velocity. B) Weight. C) Mass. D) Volume. Show Answer Correct Answer: C) Mass. 49. WHAT IS THE VALUE OF UNIVERSAL GRAVITATIONAL CONSTANT ON MOON IF ITS VALUE IS G ON EARTH A) G/2. B) G. C) G/3. D) G/6. Show Answer Correct Answer: B) G. 50. If a satellite takes time T for revolution, the kinetic energy is proportional to: A) $T^{-2}$. B) $T^{-3}$. C) $T^{\frac{2}{3}}$. D) 1/T. Show Answer Correct Answer: C) $T^{\frac{2}{3}}$. 51. What can we derived from Newton's universal law of gravitation and centripetal force formula A) Formula to determine mass of the earth and the sun. B) Formula to determine the acceleration. C) Formula to determine the gravitational force. D) None of the above. Show Answer Correct Answer: A) Formula to determine mass of the earth and the sun. 52. Gravity is the force objects put on each other because of their ..... A) Mass. B) Friendliness. C) Speed. D) Acceleration. Show Answer Correct Answer: A) Mass. 53. The correct equation to show relation between G and g is: A) G=Mm/R$^{2}$. B) G= Gm/R$^{2}$. C) G=G Mm/d$^{2}$. D) G=Mm/d$^{2}$. Show Answer Correct Answer: B) G= Gm/R$^{2}$. 54. A force of attraction between objects that is due to their masses. A) Force. B) Gravitational Pull. C) Weight. D) Gravity. Show Answer Correct Answer: B) Gravitational Pull. 55. Mass and weight are different. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 56. I am not attracted to Katy Perry ..... gravitationally. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 57. The closer together the gravitational field lines ..... A) The weaker the gravitational field strength. B) The stronger the gravitational field strength. C) The more repulsive the gravitational field strength. D) None of the above. Show Answer Correct Answer: B) The stronger the gravitational field strength. 58. If the radius of Earth is reduced to half, keeping the mass unchanged, the acceleration due to gravity will: A) Increase to four times. B) Decrease to one-fourth. C) Remain unchanged. D) Decrease to half. Show Answer Correct Answer: A) Increase to four times. 59. Doubling the mass of ONE object would have what effect on the gravitational force between them? (a) A) The force would stay the same. B) A. the force would double. C) The force would be 1/2 as much. D) The force would quadruple. Show Answer Correct Answer: B) A. the force would double. 60. Consider a space probe three times as far from Earth's center. Compared at Earth's surface, its gravitational attraction to Earth at this distance is about A) One third as much. B) One ninth as much. C) Zero. D) One half as much. Show Answer Correct Answer: B) One ninth as much. ← 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 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 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books