The average force necessary to stop a hammer with momentum p (in N-s) in 0.5 s is :-

The average force necessary to stop a hammer with 50 NS momentum in 0.05 s is

The average force that is necessary to stop a hammer with 25 Ns momentum in 0.05 s is

The average force necessary to stop a hammer with 25 N-sec momentum is 0.05 sec expressed in N is

The average force necessary to stop a bullet of mass 20 g and 250 m//s as it penetrates wood to a distance of 12 cm, is:

The average force necessary to stop a bullet of mass 20 g moving with a speed of 250 m//s , as it penetrates into the wood for a distance of 12 cm is

The average force necessary to stop a bullet of mass 20 g moving with a speed of 250 m//s , as it penetrates into the wood for a distance of 12 cm is

Is restoring force necessary in S.H.M?

Why is it necessary to compare gases at S.T.P.?