Question

What factor will velocity change if the energy is doubled but the mass remain constant. What will happen when the mass is halved for a constant energy?

Answer 1

Explanation:

In fact momentum is mass multiplied by velocity. 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.