An iron nail is driven into a block of ice by a
single blow of a hammer. The hammerhead
has a mass of 0.6 kg and an initial speed of
1 m/s. Nail and hammer are at rest after the
blow.
How much ice melts? Assume the temperature of both the ice and the nail is 0◦C before
and after. The heat of fusion of ice is 80 cal/g.
Answer in units of g.