set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

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 : 2

A boy has four options to move a body through 3m as indicated. In which case is maximum work done?

a) Push over smooth rollers

b) Lift vertically upwards

c) Push over an inclined plane

d) Push on a plane horizontal surface

Question : 3

A solid sphere is rotating in free space. If the radius of the sphere is increased keeping mass same which one of the following will not be affected ?

a) Moment of inertia

b) Angular momentum

c) Angular velocity

d) Rotational kinetic energy

Question : 4

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 : 5

A particle is projected at some angle from the surface of the planet. The motion of the particle is described by the equation; x = t, y = t - $t^2$ . Then match the following columns and select the correct answer using the codes given below the lists.

a) A – 2 ; B – 3 ; C – 1 ; D – 4

b) A – 2 ; B – 1 ; C – 4 ; D – 3

c) A – 1 ; B – 2 ; C – 3 ; D – 4

d) A – 4 ; B – 3 ; C – 2 ; D – 1

Question : 6

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