Question

*three laws of motion
*how did Newton guess the inverse-squre rule?
*universal law of gravitation
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Answer 1

3 Laws of Motion:

Law of Inertia (Newton's First Law) "An object in motion stays in motion unless acted upon by an outside force & an object at rest stays at rest unless acted upon by an outside force."

Newton's 2nd Law: "The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object."

Newton's 3rd Law: "For every action there is an equal and opposite reaction."(Meaning if you push something to the left, the exact same amount of force will be pushing you to the right but if your momentum is to the left only the object with less momentum will move)