physics
posted by help .
A sprinter has a mass of 82.0 kg. If the sprinter is running at a speed of 22.5 km/h, determine his kinetic energy. __________ × 103 J.

assume you mean 10^3
v = 22.5 km/hr (1 hr/3600 s)(1000 m/km)
answer = (1/2)(82)(v^2) Joules