Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 8 - Gravitation>Exercise>Q 8

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The gravitational potential energy of the Moon with respect to Earth is

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Important Questions on Gravitation

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Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 8 - Gravitation>Exercise>Q 1

The escape velocity of a body on the surface of the earth is

11.2 km s^{- 1}

. If the earth's mass increases to twice its present value and radius of the earth becomes half, the escape velocity becomes:

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Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 8 - Gravitation>Exercise>Q 3

A particle is kept at rest at a distance

R

(earth's radius) above the earth's surface. The minimum speed with which it should be projected so that it does not return is:

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Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 8 - Gravitation>Exercise>Q 6

The required kinetic energy of an object of mass

m,

so that it may escape, will be

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Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 8 - Gravitation>Exercise>Q 7

The value of escape velocity on a certain planet is

{2 k m s}^{- 1}

. Then, the value of orbital speed for a satellite orbiting close to its surface is

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Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 8 - Gravitation>Exercise>Q 9

The escape velocity of a particle of mass $m$ varies as

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Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 8 - Gravitation>Exercise>Q 10

The escape velocity for a body projected vertically upwards from the surface of the earth is

11 k m s^{- 1}

. If the body is projected at an angle of

45 °

with the vertical, the escape velocity will be

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Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 8 - Gravitation>Exercise>Q 1

A body is orbiting very close to the earth surface with kinetic energy KE. The energy required to completely escape from it is

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Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 8 - Gravitation>Exercise>Q 2

If

ρ

is the density of the planet, the time period of nearby satellite is given by