A factory worker pushes a box (m=25.0 kg) along a horizontal floor for a distance of 14.0 m at a constant speed. The coefficient of friction between the box and the floor is 0.15.

1. How much horizontal force must the worker exert on the box?
2. How much work is done by the force exerted by the worker on the box?
3. How much work is done by the frictional force exerted by the floor on the box while moving the box?
4. How much work is done by the supporting force of the floor during the transfer to the box?
5. What is the total work done during the transfer to the box?

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