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A box of mass 730 kg is being pulled at a constant speed across a rough...

A box of mass 730 kg is being pulled at a constant speed across a rough horizontal floor by a constant force, F. The angle of this force above the horizontal is such that the force you apply is a minimum (that is, the amount of force you need to move the box at a constant speed across the floor depends on the angle at which you pull - find the angle which the force is a minimum). Calculate the amount of work done in moving the box a distance 10 meters across the floor with this minimum force. The coefficient of kinetic friction between the box and the floor is 0.150.

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