7 Ch 12 Microsoft Edge roblemiD-83157233 712 Problem 12.38 Problem 12.36 Part A

Question

7 Ch 12 Microsoft Edge roblemiD-83157233 712 Problem 12.38 Problem 12.36 Part A You are headwaitor at a new restaurant, and your boss asks you t hang a sign for her. You're to hang the sign, whose mass is 61 kg, he configuration shown in the figure A unform horizontal rod of mass 7 8 kg and length 2 3 m holds the sign At one ond the rod is aftached to the wal by a pivot, at the other end its supported by a cable that Youre to detormine the minimum hoight h above the pivot for anchoring the cable to the wal Express your answer using two significant figures MMy Answers Give Up of 1 23m- RESTRURANT Type here to search

Explanation / Answer

balancing moment about the hinge point,

M = (2.3/2 x 7.8 x 9.81) + (2.3/2 x 61 x 9.81) - (2.3 T sin(theta) ) = 0

776.17 = 2.3 x 755 x sin(theta)

theta = 26.5 deg

tan26.5 = h / 2.3

h = 1.15 m ..........Ans

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