Q11Short answer
Avinash can run with a speed of 8 m s–1 against the frictional force of 10 N, and Kapil can move with a speed of 3 m s–1 against the frictional force of 25 N. Who is more powerful and why?
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Power of Avinash P A = F A . v A = 10 × 8 = 80 W The power of Kapil Pk = F k . v k = 25 × 3 = 75 W So, Avinash is more powerful than Kapil.