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The force FF (in pounds) needed on a wrench handle to loosen a certain bolt varies inversely with the length LL (in inches) of the handle. A force of 45 pounds is needed when the handle is 8 inches long. If a person needs 20 pounds of force to loosen the bolt, estimate the length of the wrench handle. Round answer to two decimal places if necessary.

 Feb 11, 2021
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f = k/l

45 = k/8           k = 360

 

 

f = 360/l

20 = 360/l       l = 18 inches

 Feb 11, 2021

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