Escape Velocity NEET Questions

Physics - Gravitation

Escape Velocity MCQ Questions


1.
The escape velocity of a body from the Earth's surface is defined as:
A.
The maximum velocity that the body can attain on the surface
B.
The minimum velocity required for a body to overcome the Earth's gravitational pull and never return
C.
The orbital velocity of a satellite close to the surface
D.
The velocity at which the body achieves terminal speed
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ANSWER :
B. The minimum velocity required for a body to overcome the Earth's gravitational pull and never return
2.
The formula for escape velocity from the surface of a planet of mass M and radius R is:
A.
v_e = √(GM/R)
B.
v_e = √(2GM/R)
C.
v_e = 2√(GM/R)
D.
v_e = √(GM/2R)
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ANSWER :
B. v_e = √(2GM/R)
3.
Using g = GM/R², the escape velocity can also be written as:
A.
v_e = √(gR)
B.
v_e = √(2gR)
C.
v_e = 2√(gR)
D.
v_e = √(g/R)
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ANSWER :
B. v_e = √(2gR)
4.
The approximate value of escape velocity from the Earth's surface is:
A.
7.9 km/s
B.
9.8 km/s
C.
11.2 km/s
D.
21.6 km/s
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ANSWER :
C. 11.2 km/s
5.
The escape velocity is the minimum velocity required for the body's total mechanical energy at the surface to be:
A.
Greater than zero
B.
Less than zero
C.
Zero
D.
Equal to its rest mass energy
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ANSWER :
C. Zero
6.
The SI unit of escape velocity is:
A.
m/s
B.
m/s²
C.
N
D.
kg·m/s
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ANSWER :
A. m/s