Question

What is the power output in watt of a 60 kg sprinter who accelerates from zero to 10 m per second in 3 seconds

Answer 1

m=60 kg, u=o, v = 10 m/s, t =3 s

v = u + at

10 = 0+ a * 3

a = 10/3

s = ut + 1/2 at^

s = 0 + 1/2 + 10/3*(3)^

s = 15 m

w = f *s

  = 60 * 10/3 *15

   = 3000 J

P = w/t

  = 3000/3

  = 1000 W