Two men, X and Y, try to move identical heavy boxes, P and Q.
Man X tries to push box P along the floor. The box does not move because an object is in the way.
Man Y lifts box Q from the floor onto a shelf.
Which man does the most work on their box, and which box gains the most energy?
1 )
man doing most work:X / box gaining most energy:P
2 )
man doing most work:X / box gaining most energy:Q
3 )
man doing most work:Y / box gaining most energy:P
man doing most work:Y / box gaining most energy:Q
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