Question

A man whose mass 50kg moves up 15 steps each of height 15cm in 45 seconds what is the power used in climbing those stairs

Answer 1

$\boxed {ANSWER}$

Mass = 50kg

Steps = 15

Height = 15cm

Displacement = 15×15 = 225 = 2.25m

Time = 45secs

Force = mg = 50×10 = 500N


Now work done = Force × displacement

=> 500 × 2.25

=> 1125 J


Power = Joule / time

=> 1125 / 45

=> 25 watt