A student weighing 200N climbs a flight of stairs 7.0m high in 8s. What power is required to perform this task?

Question

asked Jan 28, 2020 136k views

1 Answer

Anirban Hazarika · Answer 1 · 2020-02-02T07:43:24+0000

Answer:

Power required, P = 175 watts

Step-by-step explanation:

It is given that,

Weight of a student, F = mg = 200 N

The student climbs a flight of stairs of height, h = 7 m

Time taken, t = 8 s

We have to find the power required to perform this task. Work done per unit time is called the power required. Mathematically, it is given by :

P=(W)/(t)

W = work done

t = time taken

P=(mgh)/(t)

$P=(200\ N* 7\ m)/(8\ s)$

P = 175 watts

Hence, the power required to complete this task is 175 watts.