Calcu[ate the weight of a body in lb if it has a kinetic energy of 38.6 ft-Ib when moving at 19.5 mi/h

Answer 1

19.5 miles/h = 28.6 ft/s

(1/2) M V^2 = (M/2*818) ft^2/s^2 = 38.6 ft-lb

M = 0.0944 slugs = 3.04 lb mass