Robin pushes a wheelbarrow by exerting a 160.5N force horizontally. Robin moves it 74m at a constant speed for 23.7s. What power does Robin develop?

Question

Robin pushes a wheelbarrow by exerting a 160.5N force horizontally. Robin moves it 74m at a constant speed for 23.7s. What power does Robin develop?

Answer 1

Power = rate of doing work

P = Work/ time

Work = force * Displacement in the direction of force

P= F* displacement /time = 160.5*74.0/23.7 ( J/s or Watt as Units)

As

Given Force = 160.5 N

displacement = 74m

time= 23.7 sec

Power = 501.14 Watt