Calculating Kinetic Energy

The kinetic energy of a body is given by the formula:

kinetic energy (J) = ½ × mass × velocity²
KE = ½mv²
(Mass and velocity in kg and m/s respectively).

e.g. A 36kg boy is running at 3 m/s. His KE is:

KE = ½mv²
KE = ½ × 36 × 3²
KE = 18 × 9
KE = 162 J

Again KE is energy, so must be in joules (J).