A ball of mass 400 g moves at 5.0 m/s. What is its kinetic energy?
1.0 J1.0\ \mathrm{J}1.0 J
10 J10\ \mathrm{J}10 J
5000 J5000\ \mathrm{J}5000 J
5.0 J5.0\ \mathrm{J}5.0 J