Consider the following information:
When a force acts on an object to cause a displacement (d) of the object, it is said that work (W) was done on the object.
Power is the rate at which work is done. It is the work/time ratio. Mathematically, it is computed using the following equation:
Power (P) = work (W) / time (t)
→ P = [ force (F) x displacement (dx) ] / t
→ P = F x velocity (v)
→ P = Fv
When a force acts on an object to cause a displacement (d) of the object, it is said that work (W) was done on the object.Explanation
P = W/t = (0.50 J) / (2.0 s) = 0.25 W. Choice B is correct.