A crow bar of length 1.0 m is used as a machine to lift a box of 50kgf by placing a fulcrum at a distance of 0.2m from the box. Calculate the effort required.
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Answer:
effort arm = 1.0-0.2=0.8
L/E=Effort arm / Load arm
50/E= 08./0.2
50/E=4
therefore,
E=12.5kgf
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