Gravitation (NEET Physics): Questions 47 - 51 of 82

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Question number: 47

» Gravitation » Universal Law of Gravitation

MCQ▾

Question

Which of the following statements about the gravitational constant are false?

(1) It is a force

(2) It has no unit

(3) It has same value in all system of units

(4) It doesn’t depend on the value of the masses

Select the correct answers and mark it according to the following codes:

Choices

Choice (4) Response
a.

2 and 4 are correct

b.

1 and 2 are correct

c.

1, 2 and 3 are correct

d.

1 and 3 are correct

Question number: 48

» Gravitation » Universal Law of Gravitation

MCQ▾

Question

A mass M splits into two parts m and (M - m), which are then separated by a certain distance. What ratio of (mM) maximizes the gravitational force between the parts?

Choices

Choice (4) Response
a.

34

b.

12

c.

13

d.

23

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 -

Choices

Choice (4) Response
a.

π6radhr

b.

0.79cm

c.

2π7radhr

d.

0.1cm

Question number: 50

» 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: 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?

Choices

Choice (4) Response
a.

2GMl

b.

GMl

c.

GM2l

d.

GM3l

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