133_Dynamics 11ed Manual

133_Dynamics 11ed Manual - Engineering Mechanics - Dynamics...

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Engineering Mechanics - Dynamics Chapter 12 Problem 12-189 The crate C is being lifted by moving the roller at A downward with constant speed v A along the guide. Determine the velocity and acceleration of the crate at the instant s = s 1 . When the roller is at B , the crate rests on the ground. Neglect the size of the pulley in the calculation. Hint: Relate the coordinates x C and x A using the problem geometry, then take the first and second time derivatives. Given: v A 2 m s = s 1 1m = d 4m = e = Solution: x C es 1 = Ld e + = Guesses v C 1 m s = a C 1 m s 2 = x A = Given Lx C x A 2 d 2 + + = 0 v C x A v A x
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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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