As we can see in the illustration, Jeff stepped on the end of the board or lever and caused a huge, 600 pound rock to
be lifted in the air. The BEST explanation of what happened is
Jeff did work
The rock did work
No work was done because the lever was used
No work was done because the rock was moved vertically
Answers: 3
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As we can see in the illustration, Jeff stepped on the end of the board or lever and caused a huge,...
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