Universal Law of Gravitation NEET Questions

Physics - Gravitation

Universal Law of Gravitation MCQ Questions


1.
Newton's Universal Law of Gravitation states that every body in the universe attracts every other body with a force that is:
A.
Directly proportional to the sum of their masses and inversely proportional to the distance
B.
Directly proportional to the product of their masses and inversely proportional to the square of distance between them
C.
Directly proportional to the product of masses and directly proportional to the square of distance
D.
Inversely proportional to the product of masses and inversely proportional to the square of distance
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ANSWER :
B. Directly proportional to the product of their masses and inversely proportional to the square of distance between them
2.
The gravitational force F between two point masses m₁ and m₂ separated by distance r is given by:
A.
F = Gm₁m₂/r
B.
F = Gm₁m₂/r²
C.
F = Gm₁m₂/r³
D.
F = G(m₁+m₂)/r²
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ANSWER :
B. F = Gm₁m₂/r²
3.
The work done in lifting a body of mass m to a height h (h ≪ R) from the Earth's surface is given by:

NEET - 2019

A.
mgh
B.
mgh/2
C.
mgh/4
D.
2mgh
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ANSWER :
A. mgh
4.
The value of Universal Gravitational Constant G is:
A.
9.8 m/s²
B.
6.67 × 10⁻¹¹ N m² kg⁻²
C.
6.67 × 10⁻¹¹ N m kg⁻¹
D.
6.67 × 10⁻⁸ N m² kg⁻²
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ANSWER :
B. 6.67 × 10⁻¹¹ N m² kg⁻²
5.
The dimensional formula of Universal Gravitational Constant G is:
A.
[M⁻¹L³T⁻²]
B.
[MLT⁻²]
C.
[M⁻¹L²T⁻²]
D.
[M²L⁻²T⁻²]
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ANSWER :
A. [M⁻¹L³T⁻²]
6.
The escape velocity of a body from Earth is 11.2 km/s. If the same body were on a planet with twice the radius and eight times the mass of Earth, the escape velocity would be:

NEET - 2023

A.
22.4 km/s
B.
11.2 km/s
C.
5.6 km/s
D.
15.8 km/s
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ANSWER :
A. 22.4 km/s