Aworker pushes a 70 kg crate at a constant speed of 10 ms along a level floor by exerting a force on it that is inclined 30∘ below the horizontal. if the coefficient of kinetic friction between the floor and the crate is 0.2 , what is the net work done by all forces acting on the crate after the worker has pushed the crate a distance of 60 m?
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