In the figure, the rock weighs 240lb and is lifted 1ft by the lever. The other end of the lever is pushed down 3ft while

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answerhappygod
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In the figure, the rock weighs 240lb and is lifted 1ft by the lever. The other end of the lever is pushed down 3ft while

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In the figure, the rock weighs 240lb and is lifted 1ft by the lever. The other end of the lever is pushed down 3ft while lifting the rock. what force had to act on that end?
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