Really ANNOYING dynamics problem, HELP

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The forum discussion centers on a dynamics problem from a practice problems PDF, specifically problem number 14. The user calculates the velocity Vp as 16.74 in/s using the equation Vb = Va + (omega)ab cross (position vector)b/a, resulting in Vb as 12.56i - 12.56j. However, the expected result is 55.9 in/s, indicating a significant discrepancy in the calculations. The user seeks assistance to resolve the issue and understand how to approach the problem correctly.

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altherik
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Ok, so the problem is here:
http://polaris.deas.harvard.edu/galileo/images/material/1722/477/PracticeProblems.pdf
It's number 14.
I get Vp as 16.74 using the equation Vb = Va + (omega)ab cross (position vector)b/a, i found Vb as 12.56i-12.56j
Then i use Vp = Vb + (omega)bp cross (position vector)p/b. Computing i get 16.74 in/s, when it should be 55.9 in/s.
HELP!

Thanks much!
 
Last edited by a moderator:
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Bump.
Still having trouble. i don't see how the result can be even near 50in/s
 

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