a force is not made up of any thing. if i push you, what was that push made out of? my hands? well no because i still have my hands. if you drop an egg off a plane, what is the force made out of that makes the egg fall? the earth? well no because the earth is still there. are these things the cause of the force? yes. are they what the force is made out of? no. "for every action, there is an opposite and equal reaction"