Work, Energy & Power Mock Tests

A constant force of 100 N acts on a body of mass 10 kg initially at rest for 5 seconds. The work done by the force is:

A force F = (2x² + 3x) N acts on a particle along the x-axis. The work done in moving it from x = 1 m to x = 3 m is:

A ball of mass 0.2 kg moving at 10 m/s is caught by a glove. The glove moves back 0.5 m while stopping the ball. The average force exerted by the glove is:

A car of mass 1000 kg moves at a constant speed of 20 m/s on a level road. The power delivered by the engine against a resistive force of 200 N is:

A force F = (3x² + 2x) N acts on a particle moving along the x-axis. The work done by this force in displacing the particle from x = 1 m to x = 3 m is:

A body of mass m is dropped from a height h. Just before hitting the ground, its kinetic energy is:

The work done by a centripetal force on a body moving in a circular path is:

A bullet of mass 10 g traveling at 300 m/s strikes a wooden block and comes to rest after penetrating 0.05 m. The average force of resistance offered by the block is: