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A heavy boy and a lightweight girl are balanced on a massless seesaw. The boy moves backward, increasing his distance from the pivot point. What happens to the seesaw?.

Sagot :

crabbyabby48
A see saw is a class one lever. It moves from one center joint and moves only up or down. As the boy backs up from the middle of the seesaw his mass will weigh him down and lift the girl.
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