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Class 11 Physics Practice Test: Gravitation - Gravitational Potential Energy
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Gravitational energy or gravitational potential energy is the potential energy a massive object has in relation to another massive object due to gravity. It is the potential energy associated with the gravitational field, which is released when the objects fall towards each other.

Class 11 Physics Practice Test: Gravitation - Gravitational Potential Energy
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15 Questions

1. The force of gravity is a conservative force.
2. Consider a ring of mass “M” as shown below. What is the gravitational potential at a point “p” at a distance of “r” from the centre of the ring?
3. The value of gravitational potential inside a uniform thin spherical shell is the same everywhere.
4. Gravitational potential energy can be zero but gravitational potential can never be zero.
5. The value of gravitational potential outside a uniform thin spherical shell is the same everywhere.
6. The expression for gravitational potential energy is “-(G*M)/r”.
7. A dam produces electricity from the gravitational potential energy of the water stored in it. The same dam has 50 cubic km of water stored 50 meters above the ground. What is the work done by gravity relative to the ground? (Assume g = 10 m/s2)
8. The gravitational potential energy of a body at a distance “r” from the centre of the earth is V. Its weight at a distance “2r” from the centre of the earth is _____
9. The value of the gravitational potential at the centre of a ring of radius “a” and mass “M” is _____
10. The value ofthe gravitational field in a region is given by g = 2i + 3j. What is the change in gravitational potential energy of a particle of mass 5kg when it is taken from the origin O(0,0) to a point P(10, -5)? (Letters in bold are vectorial representations)
11. A 4kg eagle picks up a 75g snake and raises it 2.5 m from the ground to a branch. What is the work done to raise the bird’s own centre of mass to the branch? (Assume g = 10 m/s2)
12. The maximum value of gravitational potential energy is zero.
13. The velocity with which an object should be projected from the surface of the earth such that it reaches a maximum height equal to “n” time the radius of earth “R” is _____ (M = Mass of the earth)
14. Conventionally, the magnitude of gravitational potential energy for an object at infinity from the earth is _____ ((M = Mass of the earth; m = Mass of the object at infinity; R = Radius of the earth).
15. A 4kg eagle picks up a 75g snake and raises it 2.5 m from the ground to a branch. What is the work done by the eagle on the snake? (Assume g = 10 m/s2)

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