Question

A 0.25-hp motor is used to lift a load at the rate of 5.0 cm/s. How great a load can it lift at this constant speed?

Answer 1

The power of a motor

$$P=Fv$$

The corresponding load

$$F=\frac{P}{v}=\frac{186\:\rm W}{0.05\:\rm m/s}=3720\:\rm N=836\: lbs$$