(a) What is the kinetic energy in joules of a 1140-kg automobile traveling at 89 km/h? (b) How much work would have to be done to bring a 1140-kg automobile traveling at 89 km/h to a stop?
89 km / hr = 24.72 m/s
a) 1/2 m v^2 = 1/2 ( 1140) (24.72)2 joules
b) same as answer a)
+54 
