set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

Two masses m and 9 m are moving with equal kinetic energies. The ratio of the magnitudes of their momenta is

a) 3 : 1

b) 1 : 3

c) 1 : 1

d) 1 : 9

Question : 2

Which of the following is not a vector quantity?

a) Force

b) Velocity

c) Displacement

d) Volume

Question : 3

Swimming is possible on account of

a) third law of motion

b) second law of motion

c) first law of motion

d) Newton’s law of gravitation

Question : 4

The pressure exerted on the ground by a man is greatest

a) when the stands with both foot flat on the ground

b) when the stands on the toes of one foot

c) when the lies down in the ground

d) all of the above yield the same pressure

Question : 5

A parrot is sitting on the floor of a closed glass cage which is in a boy’s hand. If the parrot starts flying with a constant speed, the boy will feel the weight of the cage as

a) increased

b) reduced

c) unchanged

d) nothing can be said

Question : 6

For a body falling freely under gravity from a height

a) both kinetic energy as well as potential energy go on increasing

b) only the kinetic energy goes on increasing

c) only the potential energy goes on increasing

d) the kinetic energy goes on increasing while potential energy goes on decreasing