note that ay= 0 so that there is no ambiguity denoting axsimply as a. We choose +xto the right and +yup. We also note that the xcomponent of the rope’s tension (acting on the crate) isFx= Fcosθ = (450 N) cos 38° = 355 N, and the resistive force (pointing in the –xdirection) has magnitude f= 125 N. (a) Newton’s second law leads to 2355 N125 N0.74m/s .310 kgxFfmaa−−=¡==
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