Question

To travel at constant speed, a car engine provides 24KW of useful power. The driving force on the car is 600N. At what speed does it travel?

Answer 1

The speed traveled by the car is 40 meter per second.

Explanation:

The formula for the relation between the power and the force is as follows:

P = Fv

Where F is the force and v is the speed.

As given

To travel at constant speed, a car engine provides 24KW of useful power. The driving force on the car is 600N.

F = 600 N

Convert power from KW to W.

1 KW = 1000 W

24 KW = 24 × 1000 W

= 24000 W

Thus

P = 24000 W

Put these values in the formula.

24000 = 600 × v

24000 = 600v

`v = (24000)/(600)`

v = 40 meter per second .

Therefore the speed of the car is 40 meter per second .