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 downas positive for the man’s motion and upas positive for the sandbag’s motion and, without ambiguity, denote their acceleration as
This is the end of the preview. Sign up
access the rest of the document.