Gamma Question Bank for Engineering Physics>Chapter 7 - Gravitation>Assignment>Q 25

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Energy required to place a body of mass $m$ from an orbit of radius $2 R$ to $3 R$ is
[Given that $M =$ mass of earth, $R =$ Radius of earth]

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Important Questions on Gravitation

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Gamma Question Bank for Engineering Physics>Chapter 7 - Gravitation>Assignment>Q 26

Potential

(V)

at a point in space is given by

V = x^{2} + y^{2} + z^{2}

. Gravitational field at a point

(x, y, z)

is

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Gamma Question Bank for Engineering Physics>Chapter 7 - Gravitation>Assignment>Q 27

Three particles each of mass

m

are placed at the three corners of an equilateral triangle of side

a

, The work which should be done to increase the sides of the triangle to

2 a

is

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Gamma Question Bank for Engineering Physics>Chapter 7 - Gravitation>Assignment>Q 28

A body at rest starts from a point at a distance

r (> R)

from the center of the Earth. If

M

and

R

stand for the mass and the radius of Earth respectively, then the speed of the body when it reaches the Earth surface is

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Gamma Question Bank for Engineering Physics>Chapter 7 - Gravitation>Assignment>Q 29

Given that the gravitation potential on Earth surface is

V_{0}

. The potential at a point distant half the radius of earth from the centre will be

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Gamma Question Bank for Engineering Physics>Chapter 7 - Gravitation>Assignment>Q 32

The time period of a satellite of the earth is

10

hours. If the separation between the earth and the satellite is increased to

4

times the previous value, then what will be the new time period of the satellite?

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Gamma Question Bank for Engineering Physics>Chapter 7 - Gravitation>Assignment>Q 33

A planet is at

R

distance from sun and its time period of revolution is

T

. What will be its new time period of revolution if it is brought

0.5 R

distance closer to sun?

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Gamma Question Bank for Engineering Physics>Chapter 7 - Gravitation>Assignment>Q 34

Which of the following graphs between the square of the time period and cube of the distance of the planet from the sun is correct?

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Gamma Question Bank for Engineering Physics>Chapter 7 - Gravitation>Assignment>Q 35

How many times is escape speed than orbital speed for a satellite revolving near earth?