The beam AB has a negligible mass and

Chapter 8, Problem 8-45

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QUESTION:

The beam AB has a negligible mass and thickness and is subjected to a triangular distributed loading. It is supported at one end by a pin and at the other end by a post having a mass of 50 kg and negligible thickness. Determine the minimum force P needed to move the post. The coefficients of static friction at B and C are \(\mu_{\mathrm{B}}=0.4\) and \(\mu_{\mathrm{C}}=0.2\), respectively.

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QUESTION:

The beam AB has a negligible mass and thickness and is subjected to a triangular distributed loading. It is supported at one end by a pin and at the other end by a post having a mass of 50 kg and negligible thickness. Determine the minimum force P needed to move the post. The coefficients of static friction at B and C are \(\mu_{\mathrm{B}}=0.4\) and \(\mu_{\mathrm{C}}=0.2\), respectively.

ANSWER:

Step 1 of 3

Draw the free body diagram of the bar AB and the post BC;

                               

Moment equilibrium about point A;

                                                                      

                                               

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