121_Dynamics 11ed Manual

121_Dynamics 11ed Manual - Engineering Mechanics - Dynamics...

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Engineering Mechanics - Dynamics Chapter 12 vr ' 2 r θ ' () 2 + = v 0.237 m s = a r'' r ' 2 2 r '' 2 r' ' + 2 + = a 0.278 m s 2 = Problem 12-169 For a short time the position of the roller-coaster car along its path is defined by the equations r = r 0 , = at , and z = b cos . Determine the magnitude of the car’s velocity and acceleration when t = t 1 . Given: r 0 25 m = a 0.3 rad s = b 8 m = t 1 4s = Solution: tt 1 = rr 0 = at = zb cos = 'a = z' b sin ' = z'' b cos ' 2 = ' 2 z' 2 + = v 7.826 m s = ar ' 2 2 z'' 2 + = a 2.265 m s 2 = Problem 12-170 The small washer is sliding down the cord
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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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