set 2 MCQ Questions & Answers Detailed Explanation

Question : 1

The Leaning Tower of Pisa does not fall because

a) It covers a large base area

b) It is tapered at the top

c) Its centre of gravity remains at the lowest position

d) The vertical line through the centre of gravity of the tower falls within its base

Question : 2

The variation of displacement d with time t in the case of a particle falling freely under gravity from rest is correctly shown in the graph.

a)

b)

c)

d)

Question : 3

An artificial satellite orbiting around the Earth does not fall down. This is so because the attraction of Earth

a) Is neutralized by the attraction of the Moon

b) Does not exist at such distance

c) Provides the necessary speed for its steady motion

d) Provides the necessary acceleration for its motion

Question : 4

Weightlessness is

a) When gravity decrease

b) Zero gravity

c) In vacuum

d) None of the above

Question : 5

Who propounded the universal law of gravitation?

a) Galileo

b) Newton

c) Copernicus

d) Einstein

Question : 6

Assertion (A):
The weight of human being on the Moon is1/6 in comparison to Earth.
Reason (R):
The Moon does not have gravity like Earth.
Select the answer from following codes.

a) Both (A) and (R) are true, but (R) is not the correct explanation of (A)

b) Both (A) and (R) are true and (R) is the correct explanation of (A)

c) (A) is true, but (R) is false

d) (A) is false, but (R) is true