393_Dynamics 11ed Manual

393_Dynamics 11ed Manual - Engineering Mechanics - Dynamics...

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Engineering Mechanics - Dynamics Chapter 15 Solution: A System That Losses Mass : Here, Wm 0 t m e d d t g = Applying Eq. 15-29, we have + Σ F z m t v d d v DE t m e d d = integrating we find vv DE ln m o m 0 t m e d d t gt = with m 0 M = v DE v r = r ln m 0 m 0 t m e d d t () = t m e d d A = m 0 e vg t + v r m 0 + 1 t = A m 0 e t + v r m 0 + 1 t = A 43.3 slug s = Problem 15-129 The rocket has an initial mass m 0 , including the fuel. For practical reasons desired for the crew, it is required that it maintain a constant upward acceleration
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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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