What supposedly inspired newton to explore gravity?

Answer 1

Gravity is implicit in the third law of motion- which states- for every action, there is an equal and opposite reaction. ( this also explains, rockets, the recoil of a gun, springs, and so on) when used unqualified- as with bridge engineers, or capitalized- Reaction here means gravitational reaction- for example the weight of a bridge on the piers or contact shoes. ( of course there are chemical and nuclear reactions) but Newton was concerned with physics of his time. it can be argued, more philosophic than scientific well if the theory of opposites holds- then there ought to be- anti-gravity. food for thought, please pass the fictional Newtonian apples! ( the apple story, like the Franklin kite incident- which would have been suicidal) is an historical myth.