Fin for potatoes.
The box of potatoes hits the ground. You pushed it, starting from rest, 80 meters across level ground with a force of 30 pounds. Then you pushed it up a hill 30 meters with a force of 40 pounds. In frustration, you then kicked it off a 10-meter cliff. It now sits motionless laying on the ground. What is the net work done to the box of potatoes during the entire ordeal? (Do not take into account the ultimate destruction of the box of potatoes itself.)
The answer is 0.
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1 solution
It started at rest and now it has ended at rest. So, the net work done to the box of potatoes is zero.