255_Dynamics 11ed Manual

255_Dynamics 11ed Manual - Engineering Mechanics - Dynamics...

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Engineering Mechanics - Dynamics Chapter 14 Given 1 2 W g v 2 μ k Nd d max + () 1 2 kd max 2 Wd d max + a a 2 b 2 + + 0 = d max Find d max = d max 2.56 ft = Problem 14-18 The collar has mass M and rests on the smooth rod. Two springs are attached to it and the ends of the rod as shown. Each spring has an uncompressed length l . If the collar is displaced a distance s = s' and released from rest, determine its velocity at the instant it returns to the point s = 0. Given: M 20 kg = k 50 N m = s' 0.5 m = k' 100 N m = l 1m = d 0.25 m = Solution: 1 2 ks' 2 1 2 k' s' 2 + 1 2 Mv c 2 = v c kk ' + M s' =
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