Question

what will happen to the kinetic energy when:
I) mass is increased by 4 times at constant velocity
II) mass is increased by 4 times and velocity is decreased by 3 times

Answer 1

Answer:

The new mass is four times the original one. New velocity is halved. Substituting the new mass and velocity in the formula, we get. Thus, the kinetic energy remains the same.Hence, (i) On doubling the mass, at a constant velocity, the K.E. becomes double its original value. (ii) On doubling the velocity, at constant mass, the K.E. becomes