Question

A boy of mass 10kg climb a step of 0.2m in 20 seconds
Calculate the power of the boy

Answer 1

Provided that:

• Mass of the boy = 10 kg

• Height of the steps = 0.2 m

• Time taken = 20 seconds

To calculate:

• Power of the boy

Solution:

• Power of the boy = 1 Watts

Using concept:

• Power formula

Using formula:

• Power = Work done/Time taken

Required solution:

→ Power = Work done/Time taken

→ Power = mgh/t

→ Power = 10 × 10 × 0.2 / 20

→ Power = 10 × 2 / 20

→ Power = 20 / 20

→ Power = 1 Watts