Question

A man having a mass of 50 kg climbs the staircase of 6-meter height in 5 seconds then calculates his power. Write the name of the device that converts the energy in the following ways.

Answer 1

Answer:

100w

Explanation:

Given that ,

A man whose mass is 50kg climbs up 30 steps of a stair in 30s

each step is 20 cm high

Height at 30 steps , h=30×0.2=6 m

Change in potential energy

=mgh=50×10×6=3000 J

So, Work done by the man , W=3000 J

Power used , P= W/T = 3000/30 = 100w