Question

A 710 kg car drives at a constant speed of 23m/s . It is subject to a drag force of 500 N. What power is required from the car's engine to drive the car (a) on level ground? (b) up a hill with a slope of 2.0?

Answer 1

I may be wrong but P=F*v*cos(theta)

so 500(23.0 m/s)(cos(0))= 500(23)(1)

=11500W

1hp = 745.7W 11500W/745.7 = 15.42hp