314_Dynamics 11ed Manual

314_Dynamics 11ed Manual - = Problem 15-18 The uniform beam...

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Engineering Mechanics - Dynamics Chapter 15 Problem 15-17 When the ball of weight W is fired, it leaves the ground at an angle θ from the horizontal and strikes the ground at the same elevation a distance d away. Determine the impulse given to the ball. Given: W 0.4 lb = d 130 ft = 40 deg = g 32.2 ft s 2 = Solution: Guesses v 0 1 ft s = t 1s = Imp 1lbs = Given v 0 cos () td = 1 2 gt 2 v 0 sin θ t + 0 = Imp W g v 0 = v 0 t Imp Find v 0 t , Imp , () = v 0 65.2 ft s = t 2.6 s = Imp 0.810 lb s
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Unformatted text preview: = Problem 15-18 The uniform beam has weight W . Determine the average tension in each of the two cables AB and AC if the beam is given an upward speed v in time t starting from rest. Neglect the mass of the cables. Units Used: kip 10 3 lb = Given: W 5000 lb = g 32.2 ft s 2 = v 8 ft s = a 3 ft = t 1.5 s = b 4 ft = 312...
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