Power = Work / Time
Work = Force * Distance
Force is measured in Newtons, so 100 N is the force in this situation.
Distance in this scenario is 10 m. And time is 5 s.
Inserting known values into the formulas:
Work = 100 N * 10 m = 1000 J
(J = Joules, the equivalent of "Newton-meters")
Power = 1000 J / 5 s = 200 W
(W = Watts, the equivalent of 1 Joule / second)
In summary, 200 W of power are required for this situation.