set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

Satellite is kept moving in its orbit around the Earth; it is due to

a) Centripetal force

b) Centrifugal force

c) Gravitational force or lack of it

d) Some other forces

Question : 2

If a person sitting in a lift, then when will he feel that his weight gets increased?

a) When the elevator going down expeditiously

b) When the elevator going upward expeditiously

c) Going upward with constant velocity

d) Going downward with constant velocity

Question : 3

If the distance between the Earth and the Sun were twice what it is now, the gravitational force exerted on the Earth by the Sun would be

a) Four times as large as it is now

b) Twice as large as it is now

c) One-fourth of what it is now

d) Half of what it is now

Question : 4

A girl is swinging on a swing in sitting position. When the girl stands up, the period of the swing will

a) Be longer

b) Be shorter

c) Depends on the height of the girl

d) Not change

Question : 5

What will happen if an object is thrown into space with the speed of 8 km/s?

a) It will return to Earth

b) The object will go into space

c) It will rotate into the orbit of Earth

d) It will burst out