Question

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?

Answer 1

power is given as the product of force (F) and velocity (v)

P = F.v

now, for Avinash

F = 10N

v = 8 m/s

so,

P = 10 x 8 = 80 W

for Kapil

F = 25N

v = 3 m/s

so,

P = 25 x 3 = 75 W

thus,

Avinash is more powerful than Kapil.