# Homework Help: Heat Transfer of nail into a board

1. Sep 10, 2009

### amiv4

1. The problem statement, all variables and given/known data

A nail driven into a board increases in temperature.

2. Relevant equations

If we assume that 60 % of the kinetic energy delivered by a 1.80-\rm kg hammer with a speed of 7.80 \rm m/s is transformed into heat that flows into the nail and does not flow out, what is the temperature increase of an 8.00-\rm g aluminum nail after it is struck ten times?

3. The attempt at a solution

KE=1/2mv2
=1/2(1.8)(7.8)2
=54.756

60% of 54.756 = 32.8536

Q=mc$$\Delta$$t
32.8536=.008(910)$$\Delta$$t

2. Sep 10, 2009

### rl.bhat

Nail is struck 10 times.

3. Sep 10, 2009

### IITian

Nail is struck 10 times and moreover is there any heat loss while the nail is being driven!