295_Dynamics 11ed Manual

295_Dynamics 11ed Manual - Engineering Mechanics - Dynamics...

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Engineering Mechanics - Dynamics Chapter 14 Given: W 150 lb = k 80 lb ft = h 120 ft = Solution: T 1 V 1 + T 2 V 2 + = 00 + 02 Wh 1 2 kh L () 2 + = Lh 4 k = L 90ft = At the bottom, after A lets go of B W W g a = a kg W hL g = a 483 ft s 2 = a g 15 = Maximum height T 2 V 2 + T 3 V 3 + = Guess H 2 h = Given 0 1 2 2 + WH 1 2 kH h L 2 + = H Find H = H 218.896 ft = This stunt should not be attempted since a g 15 = (excessive) and the rebound height is above the bridge!! Problem 14-84 Two equal-length springs having stiffnesses k A and k B are nested together in order to form a shock absorber. If a block of mass
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