Question

a boy of mass 40 kg runs up a staircase of 80 steps in 25 seconds if the height of each step is to calculate the power take G is equal to 10 metre per second square​

Answer 1

Answer:

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Answer 2

Complete question:

A boy of mass 40 kg runs up a staircase of 80 steps in 25 seconds if the height of each step is to 25 cm. Calculate the power take G is equal to 10 meter per second square​.

Answer:

The power of the boy to go up the stairs is 533.67 W

Given:

Mass of the boy = 40 kg

Total number of staircase = 80 steps

Height of each step = 25 cm

Step-by-step explanation:

Height of the total staircase = 80 × 15/100 = 80 × 0.15

∴ Height of the total staircase = 12 m

Weight of the boy = mg = 40 × 9.8

∴ Weight of the boy = 392 N

Power of the boy = (Work done)/(Total time taken)

Power of the boy = (mgh)/t = (392 × 12)/9

∴ Power of the boy = 533.67 W