(1890 lbf)(1455 ft)
550 ft lbf/sec
(1890 lbf)(291 ft/sec)
Energy, Work, and Power
A race car traveling at constant velocity can go one quarter mile (1455 ft) in 5
seconds. If the motor is generating a force of 1890 lbf pushing the car, what is the
power of the motor in hp? Assume the car is already at full speed at t=0.
The main points of this chapter are summarized below.
Power is the amount of energy used per unit time.