Question

A nail driven into a board increases in temperature. If we assume that 88.6 % of the kinetic energy delivered by a 2.3-kg hammer with a speed of 7.80 m/s is transformed into heat that flows into the nail and does not flow out, what is the temperature increase in K of an 272 g aluminum nail after it is struck ten times? Assuming the specific heat capacity of aluminium is 0.9 JK-1g-1

Answer 1

1/2 mv^2 = mc changeT
or in this case: 10 * .886 * 1/2 mv^2 = mc changeT
First m is hammer, second is nail

Answer 2

do i need to convert kg to g?