Question

A car was traveling at a constant speed of 20m/s overcomes a constant frictional resistant of 300newton.. What is the horse power of the engine? (take 1hp=3/4kw) ​

Answer 1

8 hp

Step-by-step explanation:

Power = work / time

P = W/t

Work = force × distance

W = Fd

Substituting:

P = Fd/t

P = Fv

Given that F = 300 N and v = 20 m/s:

P = (300 N) (20 m/s)

P = 6000 W

P = 6 kW

Converting to horse power:

6 kW × (1 hp / ¾ kW) = 8 hp