Multiple Choice
A pallet of bricks is being lowered to the ground by a crane. If the bricks are moving at a constant speed, how much work is done by the cable on the bricks as they descend ?
9. Work & Energy
Intro to Calculating Work
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4:33 minutesOpen Question
A factory worker pushes a 30.0-kg crate a distance of 4.5 m along a level floor at constant velocity by pushing horizontally on it. The coefficient of kinetic friction between the crate and the floor is 0.25. (d) How much work is done on the crate by the normal force? By gravity?
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