Gravitation (NEET Physics): Questions 57 - 61 of 82

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Question number: 57

» Gravitation » Universal Law of Gravitation

MCQ▾

Question

A particle is suspended from a spring and it stretches the spring by 2 cm on the surface of earth. The same particle will stretches the same spring at a place 600 km above earth surface by -

Choices

Choice (4) Response

a.

0.95 cm

b.

1.35 cm

c.

1.67 cm

d.

1.8 cm

Question number: 58

» Gravitation » Gravitational Acceleration

MCQ▾

Question

If the radius of the earth were to shrink by one percent its mass remaining the same, the acceleration due to gravity on the earth’s surface would -

Choices

Choice (4) Response

a.

Decrease

b.

Remain unchanged

c.

Increase

d.

Question does not provide sufficient data or is vague

Question number: 59

» Gravitation » Gravitational Potential

MCQ▾

Question

The radius of the earth is R e and the acceleration due to gravity at its surface is g. The work required in raising a body of mass m to a height h form the surface of the earth will be,

Choices

Choice (4) Response

a.

mgh(1hRe)

b.

mg(1+hRe)

c.

mgh(1+hRe)2

d.

mgh(1+hRe)

Question number: 60

» Gravitation » Energy

MCQ▾

Question

With what velocity must a body be thrown upward form the surface of the earth so that it reaches a height of 7 Re? Earth’s mass M = 6 ⨯ 10 24 kg, radius R e = 6.4 ⨯ 10 6 m and G = 6.67 ⨯ 10 -11 N-m 2 /kg 2.

Choices

Choice (4) Response

a.

1.04105ms

b.

1.04104ms

c.

10.4103ms

d.

10.4104ms

Question number: 61

» Gravitation » Gravitational Acceleration

MCQ▾

Question

What will be the acceleration due to gravity on the surface of the moon if its radius is 14 th the radius of the earth and its mass is 140 th the mass of the earth

Choices

Choice (4) Response

a.

g10

b.

g5

c.

g6

d.

g7

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