For this problem we should start by listing the "Givens" -- Mass = 57.76 Kg , Velocity = 0.738 meters/second.
Now we should consider what the question itself is asking us -- it is asking "what is the Kinetic Energy" -- well, we should note that the formula for KE = 1/2 * m * v^2 -- so lets plug in and see what we obtain as an answer.
KE = (1/2) * (57.76 kg) * (0.738)^2
KE = (0.5) * (57.76) * (0.544) = 15.73 Joules (Joules is the SI unit for energy and as long as the mass is in Kg, and the velocity is in meters/second, we would always use the unit of Joules, unless indicated otherwise)
