Out of the following forces, which force is non-conservative?

The work done in conservative force is ____.

The angle between the line of action of force and displacement when no work done (in degree) is

If the momentum of a body is doubled, its KE. increases by

In perfectly inelastic collision, which is conserved?

In case of elastic collision, which is

Pseudo force is true only in

A men weighing 90kg carries a stone of 20 kg to the top of the building 30m high. The work done by hint is (g = 9.8 $m\mathrm{/}{s}^{2}m/s^2$ )

A weight lifter is holding a weight of 100 kg on his shoulders for 45 s, the amount of work done by him in joules is

If m is the mass of a body and E its K.E, then its linear momentum is