Escape Velocity NEET Questions

Physics - Gravitation

Escape Velocity MCQ Questions


13.
If R = 6400 km and g = 9.8 m/s², the escape velocity from the Earth's surface is approximately:
A.
7.92 km/s
B.
22.40 km/s
C.
15.84 km/s
D.
11.20 km/s
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ANSWER :
D. 11.20 km/s
14.
Escape velocity from the Moon's surface (g_M = 1.62 m/s², R_M = 1.74 × 10⁶ m) is approximately:
A.
11.2 km/s
B.
5.6 km/s
C.
2.4 km/s
D.
1.6 km/s
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ANSWER :
C. 2.4 km/s
15.
The escape velocity from Mars (g_Mars ≈ 3.7 m/s², R_Mars ≈ 3.39 × 10⁶ m) is approximately:
A.
11.2 km/s
B.
5.0 km/s
C.
2.4 km/s
D.
8.0 km/s
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ANSWER :
B. 5.0 km/s
16.
The escape velocity from Jupiter (g ≈ 25 m/s², R ≈ 7 × 10⁷ m) is approximately:
A.
11.2 km/s
B.
30 km/s
C.
60 km/s
D.
100 km/s
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ANSWER :
C. 60 km/s
17.
Escape velocity from the Sun's surface (M_Sun ≈ 2 × 10³⁰ kg, R_Sun ≈ 7 × 10⁸ m, G = 6.67 × 10⁻¹¹) is approximately:
A.
11.2 km/s
B.
118 km/s
C.
618 km/s
D.
3 × 10⁵ km/s (speed of light)
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ANSWER :
C. 618 km/s
18.
If a body is to escape from the Earth, the minimum kinetic energy it must possess at the surface (per unit mass) is:
A.
GM_E / R_E
B.
GM_E / (2R_E)
C.
2 GM_E / R_E
D.
gR_E²
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ANSWER :
A. GM_E / R_E