Question

A boy of mass 50 kg runs up a staircase of 45 steps in 9 seconds. If the height of each step is 15 cm, find the power of the boy. ( g=10 m/s2

Answer 1

If I am correct,

Then, Potential Energy = m×g×h

So, m=50kg

g=10m/s^2

h=15cm=0.15m

Now, Plug the formula

P.E. = 50 × 10 ×0.15×45

= 3375 joules

Power, P= W/t

= 3375/9

= 375 Watts

Answer 2

Answer:

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