Question

If the mass of an object is doubled and its velocity is halved, by what fraction will its
kinetic energy change?​

Answer 1

Explanation:

Kinetic energy of a body of given mass, is directly proportiional to its square of its velocity. When momentum is doubled, mass remaining constant, this means velcity is doubled. Hence, kinetic energy becomes 22=4 times i.e. say from 100 units to 400 units. and percentage increase in kinetic energy is 400−100=300% .

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