Identify the energy conversions taking place in each of the following situations. Name all of the relevant forms of energy that are involved.
(a) A camper rubbing two sticks together to start a fire.
(b) An arrow shot straight upward, from the moment the bowstring is released by the archer to the moment when the arrow reaches its highest point.
(c) A nail being pounded into a board, from the moment a carpenter starts to swing a hammer to the moment when the nail has been driven some distance into the wood by the blow.
(d) A meteoroid entering Earth’s atmosphere.