When a crate of 4 kg mass is dragged a distance of 4 m over a...

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When a crate of 4 kg mass is dragged a distance of 4 m over a horizontal surface with a kinetic friction coefficient of 0.77 between the crate and the floor, and then dragged back to its original position along the same path, what is the work done by the friction force is during the process in units of Joules? You should indicate the sign of the work in your answer. Please express your answer in 1 decimal places. When a crate of 4 kg mass is dragged a distance of 4 m over a horizontal surface with a kinetic friction coefficient of 0.77 between the crate and the floor, and then dragged back to its original position along the same path, what is the work done by the friction force is during the process in units of Joules? You should indicate the sign of the work in your answer. Please express your answer in 1 decimal places.