When you hit a nail into a board using a hammer the head of the nail gets warm. in terms of kinetic and thermal energy describe why you think this happens?

The kinetic energy is transferred to thermal energy through friction

Kinetic energy = 1/2mv^2. since the mass is constant we can form a ratio of it's kinetic energy at 60 divided by that at 30 to see ke(60)/ke(30) = +(60^2)/30^2). this may be said to 300% increase.

Ibelieve the answer is b