A15.129 Knowing that the angular velocity of rod DE is a constant 20 rad/sclockwise, determine in the position shown (a) the angular accelera-tion of bar BD, (b) the angular acceleration of bar AB.8 in.В10 in.E6 in.24 in.-Fig. P15.129 and P15.130

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Answered: Knowing that the angular velocity of…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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A
15.129 Knowing that the angular velocity of rod DE is a constant 20 rad/s
clockwise, determine in the position shown (a) the angular accelera-
tion of bar BD, (b) the angular acceleration of bar AB.
8 in.
В
10 in.
E
6 in.
24 in.-
Fig. P15.129 and P15.130

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If point C is the center of bar BD, why is CD measured as 24in and not sqrt(24^2 + 10^2)/2 or 24/2?

In other words, does converting absolute velocity to angular velocity using v = rw only work when the length r is perpendicular to v? It doesn't quite make sense to use 24 and not 24/2 in that case

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