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Direct Variation
Inverse Variation
Work Problems
Working with Radical Expressions
Rationalizing the Denominator
Solving Rational Expressions
  INVERSE VARIATION
An alternative method for solving for inverse variation is as follows:

F1l1 = F2l2

(180 lbs)(10 inches) = (x lbs)(16 inches)
  • 1800 = 16x
  • 112½ lbs = x
Conclusion: You need a force of 112½ lbs. using a wrench with a 16 inch handle. As always, there is usually more than one way to solve a problem, choose the method that you like best to use.
Wrench force
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