A travelled at a constant speed of 2m/s overcome a constant frictional resistance of 300n.what is the horse power of the engine (take h.p =4/3kw)
power = force * velocity = 300 N * 2 m/s = 600 Joules/second = 600 Watts
= 0.600 kW
then
0.600 kW * 3 hp /4 kW = 0.45 hp