Suppose that the angular velocity of rotation of the Earth is increased. Then, as a consequence,

except at poles, weight of the object on the earth, will decrease.

weight of the object, everywhere on the earth, will decrease.

weight of the object, everywhere on the earth, will increase.

there will be no change in weight anywhere on the earth.

E M B I B E

Physics Crash Course MHT-CET>Chapter 5 - Gravitation>Exercise 1>Q 111

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IMPORTANT

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The escape velocity from the surface of earth is $v_{e} .$ The escape velocity from the surface of a planet whose mass and radius are $3$ times those of the earth will be

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Important Questions on Gravitation

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Physics Crash Course MHT-CET>Chapter 5 - Gravitation>Exercise 1>Q 112

The escape velocities of the two planets, of densities

ρ_{1}

and

ρ_{2}

and having same radius, are

v_{1}

and

v_{2}

respectively. Then

EASY

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Physics Crash Course MHT-CET>Chapter 5 - Gravitation>Exercise 1>Q 113

The ratio of escape velocity at earth

(v_{e})

to the escape velocity at a planet

(v_{p})

whose radius and mean density are twice as that of the earth is

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Physics Crash Course MHT-CET>Chapter 5 - Gravitation>Exercise 1>Q 114

A satellite is revolving in a circular orbit at a height

h

from the earth's surface (radius of earth

R; h < < R

). The minimum increase in its orbital velocity required, so that the satellite could escape from the earth's gravitational field, is close to (Neglect the effect of atmosphere).

EASY

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Physics Crash Course MHT-CET>Chapter 5 - Gravitation>Exercise 1>Q 115

A satellite is moving with a constant speed

v

in a circular orbit about the earth. An object of mass

m

is ejected from the satellite such that it just escapes from the gravitational pull of the earth. At the time of its ejection, the kinetic energy of the object is

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Physics Crash Course MHT-CET>Chapter 5 - Gravitation>Exercise 1>Q 116

Given mass of the moon is