Determine the power of a car driven by a traction force equal to 0.3 kN, a distance of 0.2 km in 10 minutes.

F = 0.3 kN = 300 N.

S = 0.2 km = 200 m.

t = 10 min = 600 s.

N -?

Power N is called a scalar physical quantity that shows the speed of performing mechanical work A. Power is determined by the formula: N = A / t.

We express mechanical work A by the formula: A = F * S, where F is the traction force of the car, S is the path traveled by the car.

The formula for determining the power will take the form: N = F * S / t.

N = 300 N * 200 m / 600 s = 100 W.

Answer: the power of the car when driving is N = 100 watts.