Question

When an automobile moves with constant velocity, the power developed is used to overcome the frictional forces exerted by the air and the road.

If the engine develops 20 hp, what total frictional force acts on the car at 55 mph? One horsepower equals 746 W, and one mile is 1609 m.

Answer in units of N

Answer 1

P=F.V

Answer 2

Becarful in changing units..)

Answer 3

Hope u can Solve this..)

Answer 4

since the car is moving at constant speed, the applied force equals the frictional forces