Alpha Question Bank for Medical: Physics>Chapter 11 - Gravitation>Exercise-1>Q 38

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Escape velocity on a planet is $v_{e} .$ If the radius of the planet remains the same and mass becomes $4$ times, the escape velocity becomes

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Important Questions on Gravitation

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Alpha Question Bank for Medical: Physics>Chapter 11 - Gravitation>Exercise-1>Q 39

How many times is escape velocity

(v_{e})

, of orbital velocity

(v_{o})

for a satellite revolving near earth

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Alpha Question Bank for Medical: Physics>Chapter 11 - Gravitation>Exercise-1>Q 40

If the radius of a planet is

R

and its density is

ρ

, the escape velocity from its surface will be:-

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Alpha Question Bank for Medical: Physics>Chapter 11 - Gravitation>Exercise-1>Q 41

If

V, R

and

g

denote respectively the escape velocity from the surface of the earth, radius of the earth, and acceleration due to gravity, then the correct equation is -

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Alpha Question Bank for Medical: Physics>Chapter 11 - Gravitation>Exercise-1>Q 42

If the radius of a planet is four times that of earth and the value of

g

is same for both, the escape velocity on the planet will be -

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Alpha Question Bank for Medical: Physics>Chapter 11 - Gravitation>Exercise-1>Q 43

If the radius and acceleration due to gravity both are doubled, escape velocity of earth will become

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Alpha Question Bank for Medical: Physics>Chapter 11 - Gravitation>Exercise-1>Q 44

If

g

is the acceleration due to gravity on the earth's surface, the gain in

P E

of an object of mass

m

raised from the surface of the earth to a height of the radius

R

of the earth is

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Alpha Question Bank for Medical: Physics>Chapter 11 - Gravitation>Exercise-1>Q 45

A missile is launched with a velocity less than the escape velocity. The sum of kinetic energy and potential energy is :

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Alpha Question Bank for Medical: Physics>Chapter 11 - Gravitation>Exercise-1>Q 46

If

v_{e}

is escape velocity and

v_{0}

is the orbital velocity of a satellite for orbits close to the earth's surface, then these are related by