A lever such as that shown in Fig. 7-20 can be usedto lift

Chapter 7, Problem 7.6

(choose chapter or problem)

A lever such as that shown in Fig. 7-20 can be usedto lift objects we mightnot otherwise be able tolift. Show that the ratioof output force, Fo, toinput force, Fi, is relatedto the lengths ^ and0 from the pivot byF0/Fi = l i / lo . Ignorefriction and the mass ofthe lever, and assume thework output equals workinput.FIGURE 7-20A lever. 6.

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