Question

a boy weights 40kg claimbs up a staircase of 20 steps each of 16cm height in 20 seconds find the power generated by the boy

Answer 1

Given,
Mass=40kg
Number of steps= 20
Distance of each step =16cm
Time=20s
therefore, total height =20*16=3200cm
=3200/100=32m
We know,
work=mxgxh
=40*10*32
= 12800 J
therefore power= work/ time
=12800/20
=640 W (watt)

Answer 2

Heya folk !!

Here's the answer you are looking for

☛ Total number of steps = 20

height of each step = 16cm

so, total height he climbs = 20 × 16cm
= 320cm = 3.2m

☛ Weight of the boy = mg = 40 × 10 = 400N

☛ Time taken = 20sec

$Power = \frac{Work done }{time} \\ \\ Power = \frac{Potential \: energy}{time} \\ \\ P = \frac{mgh}{t} = \frac{400 \times 3.2}{20} \\ \\ P = 64 \: watt$



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