what is a force , Anything that causes an object to move or change direction, who discovered gravity , isaac newton , what is the unit of force , newtons (N), Law 1: , if there are no forces acting on an object, it will not move, Law 2: , when a force acts on an object, it will accelerate. The greater the force, the greater the acceleration, Law 3: , For every action, there is an equal but opposite reaction.

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