This quiz works best with JavaScript enabled. Home > Class 11 > 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 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Gravitational force between two objects are 400 N. If the mass of the two bodies is reduced to half, what will the force between them? A) 400 N. B) 200 N. C) 100 N. D) None of these. Show Answer Correct Answer: C) 100 N. 2. THE WEIGHT OF AN OBJECT IS: A) GREATER ON MOON AND LESSER ON EARTH. B) EQUAL ON EARTH AND MOON. C) GREATER ON EARTH AND LESSER ON MOON. D) NONE OF THESE. Show Answer Correct Answer: C) GREATER ON EARTH AND LESSER ON MOON. 3. A body of mass 1kg is attracted by the earth with a force which is equal to A) 9.8N. B) 6.67x1011. C) 1N. D) 9.8m/s. Show Answer Correct Answer: A) 9.8N. 4. Two objects are attracted to one another by a strength of force F. If one mass doubles and the other is tripled, what is the new gravitational force between the objects in terms of F? A) 4F. B) 6F. C) 1/9 F. D) 1/6 F. Show Answer Correct Answer: B) 6F. 5. What two qualities of objects does gravity depend on? A) What each object is made up of and the distance between them. B) What each object is made up of and the material between them. C) Each object's mass and shape. D) The mass of objects and the distance between them. Show Answer Correct Answer: D) The mass of objects and the distance between them. 6. The square of the period of revolution of a planet is directly proportional to the cube of A) The mean distance of the planet from the sun. B) The mass of the planet. C) The radius of the planet. D) The diameter of the planet. Show Answer Correct Answer: A) The mean distance of the planet from the sun. 7. The theory that gravitational force results from the bending of spacetime by an object's mass A) Einstein's theory of general relativity. B) Gravitational force is caused by the attraction of two objects with a strong magnetic field. C) Gravitational force is created by the transfer of energy between two particles. D) Gravitational force is generated by the movement of particles through a vacuum. Show Answer Correct Answer: A) Einstein's theory of general relativity. 8. As distance between two objects increases, the pull of gravity: A) Increases. B) Decreases. C) Stays the same. D) None of the above. Show Answer Correct Answer: B) Decreases. 9. Which single condition enables Newton's universal law of gravitation to be used to predict the force between the Earth and the Sun? A) The Earth and the Sun both have a very large radius. B) The distance between the Earth and the Sun is approximately constant. C) The Earth and the Sun both have a very large mass. D) The Earth and the Sun behave as point masses. Show Answer Correct Answer: D) The Earth and the Sun behave as point masses. 10. If the distance between two masses is doubled, the gravitational force between them ..... A) Becomes halves. B) Becomes one-fourth. C) Doubles. D) Remains unchanged. Show Answer Correct Answer: B) Becomes one-fourth. 11. All of the following statements are true. Which one follows directly from Kepler's third law? A) Venus is more massive than Mercury. B) Venus orbits the Sun at a slower average speed than Mercury. C) Venus is larger than Mercury. D) Venus has a thicker atmosphere than Mercury. Show Answer Correct Answer: B) Venus orbits the Sun at a slower average speed than Mercury. 12. 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) 11.2 km s$^{-1}$. C) 8.92 km s$^{-1}$. D) 5.6 km s$^{-1}$. Show Answer Correct Answer: A) 7.92 km s$^{-1}$. 13. Why does the Moon not have an atmosphere? A) Due to low mass. B) Due to high temperature. C) Due to low escape velocity. D) Due to high gravity. Show Answer Correct Answer: C) Due to low escape velocity. 14. 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) 24 Newtons. C) 160.08 Newtons. D) $8.0\times10^{-10}$. Show Answer Correct Answer: D) $8.0\times10^{-10}$. 15. What two things determine the gravity of an object? A) Mass & weight. B) Mass & distance. C) Density & mass. D) Volume & distance. Show Answer Correct Answer: B) Mass & distance. 16. What is the primary factor that determines the shape of a planet's orbit according to Kepler's first law? A) The planet's speed. B) The gravitational pull of the Sun. C) The distance from the Sun. D) The planet's mass. Show Answer Correct Answer: B) The gravitational pull of the Sun. 17. 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. 18. A particle is droped from a tower 180m high . How long does it take to reach the ground A) 3s. B) 4s. C) 5s. D) 6s. Show Answer Correct Answer: D) 6s. 19. 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 closer a planet is to the Sun, the shorter its orbital period. D) The distance from the Sun does not affect the orbital period.TagsDOK Level 2:Skill/Concept. Show Answer Correct Answer: C) The closer a planet is to the Sun, the shorter its orbital period. 20. 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. 21. 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. 22. '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. 23. 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) .7 N. C) 1.1 N. D) 1.5 N. Show Answer Correct Answer: D) 1.5 N. 24. 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) 130565.25 m. B) 361.34 m. C) 0.19575 m. D) 0.783 m. Show Answer Correct Answer: B) 361.34 m. 25. 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. ← 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 9Class 11 Physics (Part I) Chapter 6 Gravitation Quiz 10Class 11 Physics (Part I) Chapter 6 Gravitation Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books