Question

A person weighing 500 N takes 4 seconds to climb upstairs to a height of 3.0 m. what is the average power in climbing up the height?

Answer 1

Explanation:

28.125 watt is the correct answer

Answer 2

$\huge \boxed{ \fcolorbox{orange}{pink}{Answer}}$

$height of 1 step = 15 cm</p><p>Height of 15 steps = 15 × 15 cm = 225 cm</p><p>= 2.25 m</p><p>time = t = 40 sec</p><p></p><p>work done by man = F x s</p><p>= 500 x 2.25</p><p>= 1125 Joules</p><p></p><p>Power = Work done / time = 1125 / 40 =28.125 Watts</p><p></p><p></p><p>power = work done /time taken</p><p>= 500 × 2.25/40</p><p>=12.5 × 2.25 watt</p><p>=28.125 watt</p><p></p><p>$