The 1.18 kg head of a hammer has a speed of 8.2 m/s just before it strikes a nail and is brought?

The 1.18 kg head of a hammer has a speed of 8.2 m/s just before it strikes a nail and is brought to rest. Estimate the temperature rise of a 16 g iron nail generated by fifteen such hammer blows done in quick succession. ume the nail absorbs all the energy.