Acceleration Due to Gravity and its Variation With Altitude and Depth NEET Questions

Physics - Gravitation

Acceleration Due to Gravity and its Variation With Altitude and Depth MCQ Questions


1.
The acceleration due to gravity on the surface of the Earth does NOT depend on:
A.
Mass of the Earth
B.
Radius of the Earth
C.
Mass of the body falling
D.
Universal gravitational constant G
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ANSWER :
C. Mass of the body falling
2.
The value of g on the surface of the Earth is approximately:
A.
9.8 m/s²
B.
98 m/s²
C.
0.98 m/s²
D.
980 m/s²
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ANSWER :
A. 9.8 m/s²
3.
The SI unit of acceleration due to gravity is:
A.
m/s
B.
m/s²
C.
kg·m/s²
D.
N
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ANSWER :
B. m/s²
4.
The dimensional formula of g is:
A.
[L T⁻¹]
B.
[M L² T⁻²]
C.
[M L T⁻²]
D.
[L T⁻²]
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ANSWER :
D. [L T⁻²]
5.
Using g = G M_E / R_E², and given g = 9.8 m/s², R_E = 6.4 × 10⁶ m, G = 6.67 × 10⁻¹¹ N·m²/kg², the approximate mass of the Earth is:
A.
6 × 10²⁴ kg
B.
6 × 10²² kg
C.
6 × 10²⁶ kg
D.
6 × 10²⁰ kg
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ANSWER :
A. 6 × 10²⁴ kg
6.
Two planets have the same density but their radii are R₁ and R₂. The ratio of g on their surfaces (g₁/g₂) is:
A.
(R₁/R₂)²
B.
(R₂/R₁)
C.
R₁/R₂
D.
(R₁/R₂)³
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ANSWER :
C. R₁/R₂