Work, Energy & Power — NEET PYQ

A body of mass 2 kg is moving with velocity 4 m/s. Its kinetic energy is:

A spring with spring constant 200 N/m is compressed by 0.1 m. The potential energy stored is:

A 60 kg person climbs a 10 m staircase in 20 s. The power expended is: (g = 10 m/s²)

In a perfectly inelastic collision:

Work done by a force F = 10 N at angle 60° to the displacement of 4 m is:

The work-energy theorem states that:

A ball of mass 0.5 kg is dropped from height 10 m. Its velocity just before hitting the ground: (g = 10 m/s²)

Two bodies of masses m and 4m have equal kinetic energy. The ratio of their momenta is:

The coefficient of restitution for a perfectly elastic collision is:

Power of a vehicle moving at velocity v against a resistive force f is: