A box is pushed across the floor against a constant frictional force. The box is

Question

A box is pushed across the floor against a constant frictional force. The box is pushed across the room to the east in 30 seconds and returned to its starting point (pushed to the west) in 60 seconds. Consider only the constant velocity portions of the motion, ignoring the small starting and stopping times. 1. In a. Going to the east. which direction is more work done on the box by the force pushing it? b. Going to the west. c. They are both the same. 2. In a. Going to the east. which direction is more power expended by the force pushing it as it moves the box? b. Going to the west. c. They are both the same.

Explanation / Answer

1. c. They are both the same 2. a. going to east

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