There is an object with mass m = 0.5kg on the horizontal ground. A horizontal constant force F = 2.5n acts on the object and makes the object move from rest After a period of time, the action stops. The object continues to slide for a period of time and then stops. If the total distance of the object moving is s = 4m, the friction coefficient of the object is 0.2, and the work done by the force F (g = 10)

The whole process is the work of F and friction
Friction f = UMG = 1n
The work done by F is equal to the work done by friction
therefore
W=fS=1x4J=4J

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