Momentum of a system is always conserved?? justify your answer
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Explanation: energy cannot be destroyed
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According to 2nd law of Newton,
F = Change in momentum/Change in Time
We can thus notice that change in momentum of a body is zero if and only if net force acting on the body is zero. Now, when change in momentum is zero, final momemtum = Initial momentum, or momentum remains conserved. This is only possible in situations when the net force on the body is zero, NOT always.
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