554_Dynamics 11ed Manual

554_Dynamics 11ed Manual - Engineering Mechanics - Dynamics...

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Engineering Mechanics - Dynamics Chapter 17 ma Gt r OG I G α + ma Gt r OG mr OG r GP () a Gt r OG + = ma Gt r OG I G + ma Gt r OG r GP + () = Q.E.D. Problem 17-66 Determine the position of the center of percussion P of the slender bar of weight W . (See Prob. 17-65.) What is the horizontal force at the pin when the bar is struck at P with force F? Given: W 10 lb = F 20 lb = L 4f t = g 32.2 ft s 2 = Solution: k G L 12 = From Prob 17-65 r p L 2 k G 2 L 2 + = r p 2.667 ft = Guesses A x 1lb α 1 rad s 2 = Given A x F W g α L 2 = F r p 1 3 W g L α = A α Find A α , () α 32.2 rad s 2 = A x 2.35 10 14 × lb =
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