Question

A man of mass 60 kg runs up a flight of 30 steps in 15 second if its type is 21 cm high calculate the power of the man.

Answer 1

Heya folk !!

Here's the answer you are looking for

Well, I guess it must be 'each step' in place of 'its type'

So, here's your answer ↓↓↓

Power = Work done/time

And Work done = Energy

In this case, Work done = Potential energy (as work is done against gravity)

So, W = U = mgh

where,

m = 60kg

g ≈ 10m/s²

& h = Height of 30 steps

= 30 × 21cm

= 6.3m

From this we get, U = 60 × 10 × 6.3 = 3,780J

So,

☛ power (P) = 3780J / 15sec

= 252 J/s = 252Watt

★★ HOPE THAT HELPS ☺️ ★★

Answer 2

The power of man is 246.96W