Gravitation-Universal Law of Gravitation (NEET Physics): Questions 1 - 5 of 20

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Question number: 1

» Gravitation » Universal Law of Gravitation

MCQ▾

Question

A satellite of mass m is revolving in a circular orbit of radius r. The relation between the angular momentum J of satellite and mass m of earth will be –

Choices

Choice (4) Response

a.

J=GMmr

b.

J=GMm

c.

J=GMm2r

d.

J=mrM

Question number: 2

» Gravitation » Universal Law of Gravitation

MCQ▾

Question

If a graph is plotted between T 2 and r 3 for a planet then its slope will be –

Choices

Choice (4) Response

a.

GM4π2

b.

4πGM

c.

4π2GM

d.

0

Question number: 3

» Gravitation » Universal Law of Gravitation

MCQ▾

Question

If the satellite is stopped suddenly in its orbit which is at a distance = radius of earth from earth’s surface and allowed to fall freely into the earth, the speed with which it hits the surface of earth will be -

Choices

Choice (4) Response

a.

7.919msec

b.

11.2kmsec

c.

7.919kmsec

d.

11.2msec

Question number: 4

» Gravitation » Universal Law of Gravitation

MCQ▾

Question

If the period of revolution of an artificial satellite just above the earth be T second and the density of earth be ρ, kg/m 3 then

(G = 6.67 ⨯ 10 -11 m 3 /kg. second 2)

Choices

Choice (4) Response

a.

ρT2=3πG

b.

ρT 2 varies with time

c.

ρT 2 is a universal constant

d.

Both a. and c. are correct

Question number: 5

» Gravitation » Universal Law of Gravitation

MCQ▾

Question

An artificial satellite of the earth is to be established in the equatorial plane of the earth and to an observer at the equator it is required that the satellite will move eastward, completing one round trip per day. The distance of the satellite from the center of the earth will be- (The mass of the earth is 6.00 ⨯ 10 24 kg and its angular velocity = 8.30 ⨯ 10 -5 rad/sec)

Choices

Choice (4) Response

a.

2.66 ⨯ 10 3 m.

b.

2.44 ⨯ 10 7 m.

c.

2.66 ⨯ 10 5 m.

d.

2.66 ⨯ 10 7 m.

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