Gravitation-Gravitational Acceleration (NEET Physics): Questions 5 - 9 of 19

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Question number: 5

» Gravitation » Gravitational Acceleration

MCQ▾

Question

Two planets of radii in the ratio 1: 2 are made from the materials of density in the ratio 3: 1. Then the ratio of acceleration due to gravity g 1 /g 2 at the surface of two planets will be

Choices

Choice (4) Response

a.

32

b.

25

c.

23

d.

1

Question number: 6

» Gravitation » Gravitational Acceleration

MCQ▾

Question

On a planet (whose size is the same as that of earth and mass 4 times to the earth) the energy needed to lift a 2 kg mass vertically upwards through 2 m distance on the planet is (g = l0 m/sec 2 on the surface of earth) –

Choices

Choice (4) Response

a.

160 J

b.

320 J

c.

16 J

d.

32 J

Question number: 7

» Gravitation » Gravitational Acceleration

Assertion-Reason▾

Assertion (Ꭺ)

The universal gravitational constant is same as acceleration due to gravity.

Reason (Ꭱ)

Gravitational constant and acceleration due to gravity have different dimensional formula.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

b.

Ꭺ is true but Ꭱ is false

c.

Ꭺ is false but Ꭱ is true

d.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

Question number: 8

» Gravitation » Gravitational Acceleration

MCQ▾

Question

At what height above the earth’s surface the acceleration due to gravity will be 125 of its value at the earth’s surface? Radius of earth is 6400 km

Choices

Choice (4) Response

a.

25600 km

b.

2228 km

c.

12800 km

d.

2560 km

Question number: 9

» 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

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