A boy exerts a force of 225 n on a lever to raise a 125 x
A boy exerts a force of 225 N on a lever to raise a 1.25 x 10 3-N rock a distance of 13 cm. If the efficiency of the lever is 88.7%, how far did the boy move his end of the lever?
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a generation is about one third of a lifetime approximately how many generations have passed since the beginning of
a boy exerts a force of 225 n on a lever to raise a 125 x 10nbspnbsp 3-n rock a distance of 13 cm if the efficiency of
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