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Derive Newton's Second lawDerive Newton's third law |
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Answer» Newton's second law of motion states that, "The rate of change of momentum of a BODY is DIRECTLY proportional to the applied force and takes place in the direction in which force acts". Now, momentum is the product of mass and velocity. Thus, change in momentum is. Thus, we have. But, is the acceleration of the body. The Third Law The Third LawIt asserts that "If body A exerts a force on body B, then B exerts a force of equal size and opposite direction on A." It can be written: FAB = – FBA. If that POINT or interface is treated as a "body" of mass zero, then Newton's second law tells us that FNET = 0a, so Fnet = 0. |
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