Question

60kg person climbs stairs of total height 20m in 2minutes calculate his power​

Answer 1

Explanation:

Here, m=60kg, height h=20m

Work done W= change in potential energy =mgh−0=mgh=60×10×20=12000J=12kJ

Answer 2

Given:-

• Mass , m = 60kg

• Height,h = 20m

• Time ,t = 2 min = 2×60 = 120s

To Find:-

• His Power ,P

Solution:-

As we know that Power is defined as the rate of doing work.

Firstly we calculate the work done .

• W = mgh

Substitute the value we get

→ W = 60×10×20

→ W = 600×20

→ W = 12000J

And Now Calculating the Power

• P = W/t

Substitute the value we get

→ P = 12000/120

→ P = 100 Watt

Therefore the power of the person is 100 watt.