Gravitation (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 49 - 54 of 84

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Question number: 49

» Gravitation » Universal Law of Gravitation

MCQ▾

Question

A particle is suspended from a spring and it stretches the spring by 1 cm on the surface of earth. The same particle will stretches the same spring at a place 800 km above earth surface by -

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Choice (4) Response

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b.

c.

d.

Question number: 50

» Gravitation » Gravitational Acceleration

MCQ▾

Question

At what height above the earth’s surface the acceleration due to gravity will be 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: 51

» Gravitation » Universal Law of Gravitation

MCQ▾

Question

Three particles of equal mass m are situated at the vertices of an equilateral triangle of side l. What should be the velocity of each particle, so that they move on a circular path without changing l?

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Choice (4) Response

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b.

c.

d.

Question number: 52

» Gravitation » Energy

MCQ▾

Question

If g is the acceleration due to gravity on the earth’s surface the gain in P. E. of an object of mass m raised from the surface of the earth to a height of the radius R of the earth is -

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Choice (4) Response

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b.

c.

d.

Question number: 53

» Gravitation » Universal Law of Gravitation

MCQ▾

Question

What is the mass of the planet that has a satellite whose time period is T and orbital radius is r?

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Choice (4) Response

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b.

c.

d.

Question number: 54

» Gravitation » Orbital Velocity of a Satellite

MCQ▾

Question

The speed with which the earth have to rotate on its axis so that a person on the equator would weigh the as much as present will be - (Take the equatorial radius as 6400 km. )

Choices

Choice (4) Response

a.

7.28 ⨯ 10 -3 rad/sec

b.

9.35 ⨯ 10 -4 rad/sec

c.

3 28 ⨯ 10 -3 rad/sec

d.

5.53 ⨯ 10 -4 rad/sec

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