A force of 110 N is applied horizontally to the handles of a lawnmower to move it at a speed of 0.80 m/s across a lawn. Find the power used to mow the lawn.
Power is the rate of doing work, P = W/t. As is implied by the equation for power, a unit of power is equivalent to a unit of work divided by a unit of time. We calculate as follows:
P = W/t = Fd/t where d/t = v P = Fv = 110(80) power is 8800 watts
