A women lifts a 300 newton child a distance of 1.5 meters in 0.75 seconds. What is her power output in lifting the child?

Power = (work) / (time)

but Work = (force) x (distance)

so Power = (force) x (distance) / (time)

= (300 N) x (1.5 m) / (0.75 sec)

= (450 J) / (0.75 sec)

= 600 J/sec = 600 watts.

600 watts = 0.8 horsepower!

Poor lady!

The reason for that is that her kid weighs almost 70 pounds!