This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Physics (Part I) Chapter 6 Gravitation – Quiz 13 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part I) Chapter 6 Gravitation Quiz 13 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the role of the gravitational constant (G) in Newton's Law of Gravitation? A) It determines the strength of the gravitational force. B) It measures the mass of the objects involved. C) It calculates the distance between two objects. D) It defines the speed of light in a vacuum. Show Answer Correct Answer: A) It determines the strength of the gravitational force. 2. What is the importance of the universal law of gravitation? A) It explains the motion of objects on the earth. B) It explains the motion of objects in space. C) It helps in designing ships and submarines. D) All of the above. Show Answer Correct Answer: D) All of the above. 3. What is the relationship between mass of object and distance between objects ..... A) Mass increase, gravitational force increase. B) Mass increase, gravitational force decrease. C) Mass decrease, gravitational force increase. D) None of the above. Show Answer Correct Answer: A) Mass increase, gravitational force increase. 4. Two objects are attracted to each other with 1000 N of gravitational force.What would the force between them be if the distance between them were 12x smaller? A) 6, 000 N. B) 36, 000 N. C) 12, 000 N. D) 144, 000 N. Show Answer Correct Answer: D) 144, 000 N. 5. Any object with mass is surrounded by a gravitational field. A) True. B) Fallse. C) False. D) Tru. Show Answer Correct Answer: A) True. 6. THE ACCELARATION DUE TO GRAVITY VARIES ON EARTH WITH A) DISTANCE FROM EQUATOR. B) ALTITUDE. C) MASS OF AN OBJECT. D) (A) AND (B). Show Answer Correct Answer: D) (A) AND (B). 7. Two spherical objects have masses of 50 kg and 50 kg. Their centers are separated by a radius distance of 20 m. Find the change in the gravitational attraction Force between them if the radius distance doubles in length, and the one mass doubles while the other mass doesn't change. A) It does not change the overall force of gravitation. B) It decreases by a factor of 1/2. C) It decreases by a factor of 1/4. D) It increases by a factor of 4. Show Answer Correct Answer: B) It decreases by a factor of 1/2. 8. What happens to the magnitude of force when one mass is doubled and the other mass is tripled? A) The force decreases by 1/6. B) The force increases by a factor of 6. C) The force is doubled. D) The force is tripled. Show Answer Correct Answer: B) The force increases by a factor of 6. 9. If the distance between two objects is halved, what happens to the gravitational force between them according to Newton's law of universal gravitation? A) It doubles. B) It halves. C) It quadruples. D) It remains the same. Show Answer Correct Answer: C) It quadruples. 10. Why don't satellites get closer to the Earth even though the Earth pulls on them? A) The pull from the sun cancels their movement. B) The pull from the moon cancels their movement. C) They are out of Earth's gravitational field. D) They fall at the same rate that the Earth curves away from them. Show Answer Correct Answer: D) They fall at the same rate that the Earth curves away from them. 11. What is the force exerted by the earth on a 10 kg object on the moon? A) 10 N. B) 16.7 N. C) 98 N. D) Depends on the distance between the earth and the moon. Show Answer Correct Answer: B) 16.7 N. 12. The mass of a body is measured to be 12 kg on the earth. If it is taken to the moon, its mass will be (a) 12 kg (b) 6 kg(c) 2 kg (d) 72 kg A) A. B) B. C) C. D) D. Show Answer Correct Answer: A) A. 13. POOJITHA placed an object in water and observed the upward force exerted by water on it. What is this force called? A) Pressure. B) Thrust. C) Buoyancy. D) Drag. Show Answer Correct Answer: C) Buoyancy. 14. Which statement about gravity is true? A) Gravity causes objects to pull towards one another. B) Gravity causes objects to push away from each other. C) Gravity only takes place between planets. D) The moon doesn't have any gravity. Show Answer Correct Answer: A) Gravity causes objects to pull towards one another. 15. The weight of a 1 kg object on the moon is A) 1kg. B) 1.633333kg. C) 1.633333N. D) 1N. Show Answer Correct Answer: C) 1.633333N. 16. There are two planets, each with the same surface gravity but planet 1 has a greater radius and is less massive than planet 2. Which of these planets has a greater escape velocity? A) Planet 1. B) Planet 2. C) Both have the same escape velocity because surface gravity is equal. D) Not enough information given. Show Answer Correct Answer: B) Planet 2. 17. A spacecraft is placed in a circular orbit around a planet with mass 6.4 x 10$^{23}$ kg. The spacecraft orbits at a height of 4.5 x 10$^{7}$ m above the planet's surface. What additional information is needed to calculate the speed of the spacecraft in the orbit? A) No additional information. B) The planet's radius only. C) The spacecraft's mass only. D) Both the planet's radius and the spacecraft's mass. Show Answer Correct Answer: B) The planet's radius only. 18. What happens to the force of gravity if the mass of one of the objects is doubled? A) The force of gravity doubles. B) The force of gravity is tripled. C) The force of gravity is halved. D) The force of gravity increases 4 times. Show Answer Correct Answer: A) The force of gravity doubles. 19. What is the position of a ball thrown vertically upward after 4 seconds? A) At the highest point. B) At the lowest point. C) In the middle of the trajectory. D) Cannot be determined. Show Answer Correct Answer: D) Cannot be determined. 20. Explain how Newton's law of gravitation applies to objects in orbit. A) Gravity only affects objects on the ground, not those in space. B) Newton's law of gravitation explains that objects in orbit are in free fall towards a larger mass, balanced by their tangential velocity, resulting in a stable orbit. C) Orbits are caused by the repulsion between two objects of equal mass. D) Objects in orbit are stationary and do not experience any forces. Show Answer Correct Answer: B) Newton's law of gravitation explains that objects in orbit are in free fall towards a larger mass, balanced by their tangential velocity, resulting in a stable orbit. 21. If the radius of Earth is 6400 km and mean value of g' on the surface is 9.8 m s$^{-2}$, the value of acceleration due to thegravity at a height 100 km above the surface of Earth is A) 7.5. B) 8.7. C) 9.5. D) 10. Show Answer Correct Answer: C) 9.5. 22. A child whirls a ball in a vertical circle. Assuming the speed of the ball is constant, when would the tension in the cord connected to the ball be the greatest. A) At the top of the circle. B) At the bottom of the circle. C) A little after the bottom of the circle when the ball is climbing. D) A little before the bottom of the circle when the ball is descending quickly. E) Nowhere; the cord is stretched the same amount at all points. Show Answer Correct Answer: B) At the bottom of the circle. 23. The mass of a body is increased 4 fold and mass of other body is increased 16 fold. How should the distance between them be changed to keep the same gravitational force between them? (a) 4 times (b) 4 1 times (c) 8 times (d) 8 1 times A) A. B) B. C) C. D) D. Show Answer Correct Answer: C) C. 24. Which is the formula for Newton's Law of Universal Gravitation? A) F = G * m$_{1}$m$_{2 }$/ r. B) F = G * m$_{1}$m$_{2 }$/ r$^{2}$. C) F = G * m$_{1}$m$_{2 }$/ 2r. D) F = m$_{1}$m$_{2 }$/ 2r. Show Answer Correct Answer: B) F = G * m$_{1}$m$_{2 }$/ r$^{2}$. 25. According to Kepler's second law, what happens to a planet's orbital speed as it moves away from the Sun? A) The speed becomes zero. B) The speed remains constant. C) The speed decreases. D) The speed increases. Show Answer Correct Answer: C) The speed decreases. ← 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