Answer:
87.08 W
Explanation:
Power expended by the boy is power needed/ power experienced to/by the wagon throughout this process of pulling.
When the force F is constant and the angle between the force and the displacement s is θ, then the work done is given by W = Fs cos θ.
Assuming that the force and displacement of the wagon are in the same direction cos(θ)= cos(0)= 1
So, W= 38 * 550 (SI units)
W=20,900 J
[tex]Power = \frac{Work done}{Time taken}[/tex]
Power = [tex]\frac{20,900}{240}[/tex]
87.08 W
