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A worker pushes a 27.0kg crate a distance 9.50m along a level floor at constant speed...

A worker pushes a 27.0kg crate a distance 9.50m along a level floor at constant speed by exerting a pushing force on the crate which is directed 35.0◦ below the horizontal. The coefficient of kinetic friction is 0.230. (a) How much work did the worker do on the crate? Now the worker pushes the same crate up a 35.0◦ incline at constant speed, with the same kinetic friction coefficient. This time the worker pushes horizontally on the crate. Over the same distance of 9.50 m, how much work is done by (b) the worker, (c) the force of gravity, (d) the normal force of the incline, and (e) the force of friction?

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