Forces and motion• That action is a

Forces and motion• That action is always equal to reaction, no matter what kind of objects we are talking about, is something out of my mind. The example regarding the headon collision between a tiny car and a big truck makes me wonder about Newton. He must have been a genius to discover such a law! • Although the law of action and reaction is perhaps the simplest law I have learned, if you really think about it, it is a strange law, perhaps the strangest law I have learned so far. • The fact that there can be straight-line motion at extremely high constant speeds in the absence of a net force makes you see motion as mysterious a phenomenon as electricity and magnetism.