Physics Lesson

Newton's laws of motion

The three laws proposed by Sir Isaac Newton to define the concept of force and describe motion, used as the basis of classical mechanics. The first law states that a body at rest tends to stay at rest, and a body in motion tends to stay in motion at a constant speed in a straight line, unless acted upon by a force. The second law states that the acceleration of a body is equal to the force acting upon it divided by the body's mass. The third law states that for every action there is an equal and opposite reaction.
 
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