161_Dynamics 11ed Manual

161_Dynamics 11ed Manual - g sin ( ) k cos ( ) − ( ) = a...

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Engineering Mechanics - Dynamics Chapter 13 *Problem 13-20 A suitcase of weight W slides from rest a distance d down the rough ramp. The coefficient of kinetic friction along ramp AB is μ k . The suitcase has an initial velocity down the ramp v 0 . Determine the point where it strikes the ground at C . How long does it take to go from A to C ? Given: W 40 lb = d 20 ft = h 4f t μ k 0.2 = θ 30 deg = v 0 10 ft s = g 32.2 ft s 2 = Solution: F N W θ () 0 = F N W θ () = W θ μ k W θ () W g a =
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Unformatted text preview: g sin ( ) k cos ( ) − ( ) = a 10.523 ft s 2 = v B 2 ad v 2 + = v B 22.823 ft s = t AB v B v − a = t AB 1.219 s = Guesses t BC 1 s = R 1 ft = Given g − 2 ⎛ ⎝ ⎞ ⎠ t BC 2 v B sin ( ) t BC − h + = R v B cos ( ) t BC = t BC R ⎛ ⎜ ⎝ ⎞ ⎟ ⎠ Find t BC R , ( ) = t BC 0.257 s = R 5.084 ft = t AB t BC + 1.476 s = 159...
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This note was uploaded on 08/16/2011 for the course EGN 3321 taught by Professor Christianfeldt during the Spring '08 term at University of Central Florida.

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