Question
(a) What is the average useful power output of a person who does $6.00\times 10^{6}\textrm{ J}$ of useful work in 8.00 h? (b) Working at this rate, how long will it take this person to lift 2000 kg of bricks 1.50 m to a platform? (Work done to lift his body can be omitted because it is not considered useful output here.)
1. $208\textrm{ W}$
2. $141 \textrm{ s}$