Consider a moving cart of mass 120 kg with a kinetic energy K .If it's velocity is doubled how much should the mass be decreased so that the KE does not change?
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Mass of cart = 120 kg
But according to questions if velocity is double then mass should be decreased so that there is no change in K.E. We have seen if velocity is double then K.E of cart becomes 240 joules. Therefore mass of cart should decreased so that K.E. remains same.
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