80. (a) Using Eq. 7-32, the work becomes W= 92x2– x3(SI units understood). The plot is shown below: (b) We see from the graph that its peak value occurs at x= 3.00 m. This can be verified by taking the derivative of Wand setting equal to zero, or simply by noting that this is where the force vanishes.
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This note was uploaded on 03/19/2010 for the course PHYSICS 191262 taught by Professor Najafzadeh during the Spring '09 term at The Petroleum Institute.