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establish Newton's first law from second law
Asked by anirbanagasti2002 | 06 Jun, 2021, 09:24: AM
Newton's second law states that rate of change of momentum of object equals the force acting on it.

If force acting on it is zero , then change in momentum is zero and there is no state of change of motion of object.

Hence according to first law , in absence of external force , the object continues its state of motion .
If any change in state of motion , then this change in state of motion is due to external force

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