Hw 6 - PROBLEM 3.39 Consider the volleyball net shown....

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PROBLEM 3.39 Consider the volleyball net shown. Determine the angle formed by guy wires AD and AC. SOLUTION First note and By definition or AB = ~(-6.5)' + (-S)' + (2)' = 10.5 ft AC = ~(O)' + + (6)' = 10 = -{6.5 ft)I-(S ft)J + (2 ft)k = -{S ft)j + (6 ft)k AB· AC =(AB)(AC)co,O (--6.51 - Sj + 2k)· (-Sj+ 6k) = (l0.5)(l0)co,O (--6.5)(0) + (-S)(-S) + (2X6) = 105 co,O eos8==O.7238) or 8=43.6 0 ...
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O.3m , PROBLEM 3.48 The O.61x1.00-m lid ABeD of a storage bin is hinged along side AB and is held open by looping cord DEC over a frictimdess hook at E. If the reMioD in the cord is 66 N, determine the moment about each of the coordinate axes of the force exerted by the cord at C. SOLUTION First note z ~ .j(0.61)' - (0.11)' = 0.60 m Then deE = J( -0.7)' + (0.6)' + (-0.6)' = 1.1 m and TeE ~ 66 N (-<l.7i+ 0.6J-0.6k) l.l = 6[-(7 N)i +(6 N)j-(6 N)k] Now where
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This note was uploaded on 10/05/2009 for the course CE statics taught by Professor Epstein during the Spring '09 term at UConn.

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Hw 6 - PROBLEM 3.39 Consider the volleyball net shown....

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