ch05-p058 - 58. Referring to Fig. 5-10(c) is helpful. In...

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58. Referring to Fig. 5-10(c) is helpful. In this case, viewing the man-rope-sandbag as a system means that we should be careful to choose a consistent positive direction of motion (though there are other ways to proceed – say, starting with individual application of Newton’s law to each mass). We take down as positive for the man’s motion and up as positive for the sandbag’s motion and, without ambiguity, denote their acceleration as
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