set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

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 : 2

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 : 3

Light year is

a) the distance travelled by light in free space in one year.

b) time taken by light to travel from sun to earth.

c) light emitted by the sun in one year.

d) time taken by earth to go once around the sun.

Question : 4

Which of the following is not a vector quantity?

a) Force

b) Velocity

c) Displacement

d) Volume

Question : 5

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 : 6

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