A car traveling at 30ms(^{-1}) overcomes a frictional resistance of 100N while moving. Calculate the power developed by the engine. [1 hp = 0.75 kW]
-
A.
0.23hp -
B.
0.40hp -
C.
4.00hp -
D.
4.40hp
Correct Answer: Option C
Explanation
P = FV = (frac{100 times 30}{1000} = 3 kW)
(frac{3}{0.75} = 4hp)