Question

a girl of mass 40 kg runs up stairs of 30 steps in 10 s. if the height of each step is 0.1, find the power developed by her. take g = 10 ms-2 please guys need your help !!!​

Answer 1

Explanation:

Given, mass of the boy, m=40kg ;

total height gained, h=50×10cm

                                    =500cm=5m

time taken to climb, t=5s

Work done by the boy,

W=mgh=(40)(10)(5)=2000J

Power developed, P=tW=52000=400W