Jack Lift
April 7th, 2010 No comments
How much weight can he lift with this jack?
A hydraulic jack has a 12 inches piston to support the load. The piston to apply the effort force has an area of 0.85 sq. in. If the maxiumum effort force that a man can exert is 90 lbs, how much weight can he lift with this jack?
F’ = (A’/A)f = (πr²/A)f = (π6²/0.85)90 = (113.1/0.85)90 = 11,975 lbs
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