299_Dynamics 11ed Manual

299_Dynamics 11ed Manual - gondola which is lifted to a...

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Engineering Mechanics - Dynamics Chapter 14 Solution: Guess s max 100 mm = Given 4 1 2 kl δ () 2 M gs max 2 1 2 kl s max + () 2 + 2 1 2 kl s max () 2 + = s max Find s max () = s max 49.0 mm = Problem 14-90 The ball has weight W and is fixed to a rod having a negligible mass. If it is released from rest when θ = 0 °, determine the angle at which the compressive force in the rod becomes zero. Given: W 15 lb = L 3f t = g 32.2 ft s 2 = Solution: Guesses v 1 m s θ 10 deg = Given WL 1 2 W g v 2 WL θ () + = W θ () W g v 2 L = θ Find θ , () = v 8.025 ft s θ 48.2 deg = Problem 14-91
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Unformatted text preview: gondola which is lifted to a height h at A . If it is released from rest and falls along the parabolic track, determine the speed at the instant y = d. Also determine the normal reaction of the tracks on the gondola at this instant. The gondola and passenger have a total weight W . Neglect the effects of friction. Given: W 500 lb = d 20 ft = h 120 ft = a 260 ft = 297...
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