Physics problem help please?
An engine expends 48.3 hp in moving a car along a level track at a speed of 12.3 m/s. How large is the total force acting on the car in the opposite direction of the motion of the car?
An engine expends 48.3 hp in moving a car along a level track at a speed of 12.3 m/s. How large is the total force acting on the car in the opposite direction of the motion of the car?
Comments
48.3 HP = 36 kW or 36 kJ/s
in one second, the car moves 12.3 meter and uses an energy of 36 kJ
Energy = F x distance
36 kJ = F x 1
F = 36 kN