Gravitation (BITSAT Physics): Questions 1 - 4 of 4

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Question number: 1

» Gravitation » Gravitational Potential

MCQ▾

Question

If the gravitational force had varied as r52 instead of r2 . The potential energy of a particle at a distance r from the centre of the earth would be proportional to

Choices

Choice (4) Response

a.

r32

b.

r1

c.

(r1r2)32

d.

r2

Question number: 2

» Gravitation » Gravitational Acceleration

MCQ▾

Question

At what height from the earth surface, the acceleration of gravity will be half the value of g at surface? (R=6400km).

Choices

Choice (4) Response

a.

1600km

b.

4800km

c.

8200km

d.

6400km

Question number: 3

» Gravitation » Universal Law of Gravitation

MCQ▾

Question

The mass of the planet is 19th of the mass of the earth and its radius is half that of the radius of the earth. If a body weighs 450N on the earth, then what will be its weight on planet?

Choices

Choice (4) Response

a.

400N

b.

200N

c.

150N

d.

100N

Question number: 4

» Gravitation » Gravitational Acceleration

MCQ▾

Question

The mass of moon is 7.34×1022kg if the acceleration due to gravity on the moon is 1.4ms2, the radius of the moon is –

(G=6.667×1011Nm2kg2)

Choices

Choice (4) Response

a.

1.86×106m

b.

0.56×104m

c.

1.01×1011m

d.

1.92×106m

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