23. (a) All forces are vertical and all distances are measured along an axis inclined at θ= 30º. Thus, any trigonometric factor cancels out and the application of torques about the contact point (referred to in the problem) leads to ()223tripcep15kg 9.8m/s35cm2.0kg 9.8m/s15cm==1.9 10 N.2.5cmF−×(b) The direction is upward since
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