a boy and a man running with the same speed have different Kinetic energies Share with your friends Share 0 Satyam Ranjan Sinha answered this 0 View Full Answer Radha Muchhala answered this A running man has the same kinetic energy as that of a boy of half his mass. The man speeds up by 2 ms-1 and the boy changes his speed by x ms-1 so that the kinetic energies of the boy and the man are again equal. Then x in m s-1 is -1
