Question:
Avinash can run with a speed of $8 \mathrm{~m} \mathrm{~s}^{-1}$ against the frictional force of $10 \mathrm{~N}$, and Kapil can move with a speed of $3 \mathrm{~ms}^{-1}$ against the frictional force of $25 \mathrm{~N}$. Who is more powerful and why?
Solution:
$P=F u$
Power of Avinash $=10 \times 8=80 \mathrm{~W}$
Power of Kapil $=25 \times 3=75 \mathrm{~W}$
So, Avinash is more powerful.
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