A hammer is used to knock a nail into a block of wood.
The head of the hammer has a mass of 0.60 kg. It is moving at 5.0 m/s just before it hits the nail. The hammer head stops after it hits the nail.
Calculate the kinetic energy of the hammer head just before it hits the nail.
Describe what happens to the energy in the kinetic store of the hammer head when it hits the nail.
Give one observation that shows that energy has been transferred to a thermal store.
The hammer is replaced by one with a head of twice the mass. It hits the nail at the same speed.
Explain how this affects the energy transferred to the nail and the wood with each hit.