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In the figure, the rock weighs215lb and is lifted 1 ft by the lever. 3FT and 3D (a) How much work is done? ft-lb (b)

In the figure, the rock weighs215lb and is lifted 1 ft by the lever.

3FT and 3D

(a) How much work is done? ft-lb (b) The other end of the lever is pushed down 3 ft while lifting the rock. What force had to act on that end? lb

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