Physics, 24.03.2020 22:57 wrightdarius78

A rock of mass 170 kg needs to be lifted off the ground. One end of a metal bar is slipped under the rock, and a fulcrum is set up under the bar at a point that is 0.65 m from the rock. A worker pushes down (perpendicular) on the other end of the bar, which is 1.9 m away from the fulcrum. What force is required to move the rock?

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A rock of mass 170 kg needs to be lifted off the ground. One end of a metal bar is slipped under the...