123_Dynamics 11ed Manual

123_Dynamics 11ed Manual - Engineering Mechanics - Dynamics...

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Engineering Mechanics - Dynamics Chapter 12 2 rr'' 2 r' 2 + a b 2 cos b θ () ' 2 = r'' a b 2 cos b ' 2 2 r' 2 2 r = v r r' = v r 0 m s = v r ' = v 12 ft s = a r r'' r ' 2 = a r 216 ft s 2 = a 2 r' ' = a 0 ft s 2 = * Problem 12-172 If the end of the cable at A is pulled down with speed v , determine the speed at which block B rises. Given: v 2 m s = Solution: v A v = L 2 s B s A + = 02 v B v A + = v B v A
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