mechanics (mass, force, acceleration, work, energy, momentum, velocity) - Category wise Question and Answer Practice Test with Solutions

Question : 6

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 : 7 [PSC (Pre) 2017]

Which of the following is not a vector quantity?

a) Force

b) Velocity

c) Displacement

d) Volume

Question : 8

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 : 9

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 : 10

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