Question

A student who weighs 545 N climbs a stairway (vertical height of 4.0 m) in 22 s.(a) How much work is done?answer with:_____ J(b) What is the power output of the student? answer with:_____W

Answer 1

a)

The formula for calculating work done is

Work done = force x distance

From the information given,

force = 545

distance = 4

time = 22

Thus

work done = 545 x 4

Work done = 2180 J

b) Power output = work done/time

Power output = 2180/22

Power output = 99.09 W