MDCAT Physics Chapter 2 Work and energy Online Test MCQs With Answers

The momentum of a particle is numerically equal to its K.E. What is the velocity of a particle?

A body of mass 3 Kg lies on the surface on the table 2m high. It is moved on the surface by 4m. The change of P.E will be:

If the momentum of a body is increased n times, its kinetic energy increases:

A motor boat is travelling with a speed of 3.0 m/sec. If the force on it due to water flow is 500 N, the power of the boat is

If the velocity of a body becomes half, the kinetic energy of body will become

If the K.E. of a body is increased by 300%, its momentum will increase by:

A man M₁ of mass 80 kg runs up a staircase in 15s. Another man M₂ also of mass 80 kg runs up the same staircase in 20s. The ratio of the power developed by them will be

Two bodies moving towards each other collide and move away in opposite directions. There is some rise in temperature of bodies because a part of the kinetic energy is converted into

. A force "F1" acts on a body through distance "S1" in the direction of motion and does work "W1". Similarly another force "F2" act on same body through distance "S2" but in opposite to the direction of motion and does work "W2". Now if F1 = F2 and S1 = S2 then which statement is correct.

In a gravitational field when work done by gravity is negative then