Escape Velocity NEET Questions

Physics - Gravitation

Escape Velocity MCQ Questions


7.
The escape velocity from the Earth's surface is v. The escape velocity from the surface of another planet having a radius four times that of Earth and the same mass density is:

NEET - 2021

A.
3v
B.
4v
C.
v
D.
2v
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ANSWER :
B. 4v
8.
The escape velocity does not depend on:
A.
The planet’s mass
B.
The planet’s radius
C.
The gravitational constant
D.
The mass of the escaping body
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ANSWER :
D. The mass of the escaping body
9.

The ratio of the escape velocities of two planets of the same density but different radii (R1 and R2) is:

A.

R1/R2

B.

√(R1/R2)

C.

(R1/R2)2

D.

(R1/R2)2

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ANSWER :

B. √(R1/R2)

10.
If the acceleration due to gravity on a planet is g and its radius is R, then its escape velocity is given by:
A.
√(gR)
B.
√(2gR)
C.
gR
D.
2gR
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ANSWER :
B. √(2gR)
11.
The escape velocity from a planet is independent of:
A.
Mass of the planet
B.
Radius of the planet
C.
Mass of the escaping object
D.
Gravitational constant
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ANSWER :
C. Mass of the escaping object
12.
What happens to the escape velocity if the mass of the planet is tripled while keeping the radius constant?
A.
Increases by √3 times
B.
Decreases by √3 times
C.
Remains the same
D.
Becomes half
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ANSWER :
A. Increases by √3 times