SOLUTION: A worker tearing down a barn, uses a pinch bar 4 ft. long with the shorter end 2in. from the fulcrum. If the worker can excert a force of 150 lbs. at one end of the pinch bar, how

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Question 71219: A worker tearing down a barn, uses a pinch bar 4 ft. long with the shorter end 2in. from the fulcrum. If the worker can excert a force of 150 lbs. at one end of the pinch bar, how great a force can he excert at the other end? (Note the differences in units, 2 in. and 4 ft. Units must be the same when using the lever formula.)
w1 d1 = w2d2
I'm lost after this. Can you help?
Dorothy
Found 2 solutions by checkley75, stanbon:
Answer by checkley75(3666)   (Show Source): You can put this solution on YOUR website!
48*150=2x
2x=7200
x=7200/2
x=3600 pounds of force
Answer by stanbon(75887)   (Show Source): You can put this solution on YOUR website!
A worker tearing down a barn, uses a pinch bar 4 ft. long with the shorter end 2in. from the fulcrum. If the worker can excert a force of 150 lbs. at one end of the pinch bar, how great a force can he excert at the other end?
w1 d1 = w2d2
--------------------
w1*2 = 150*48
w1 = 3600 lbs. of force
---------------------
Cheers,
Stan H.
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