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Explain Newton's second law.

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The rate of change of momentum of a body is directly proportional to the unbalanced force applied in the direction of the force. 

If a body of mass m is moving with initial velocity u along a straight line and is uniformly accelerated to a velocity v by applying a force F for time t then, the rate of change of momentum = force applied. 

F=\frac{m(v-u)}{t}

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Safeer PP

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