Really ANNOYING dynamics problem, HELP

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The user is struggling with a dynamics problem from a practice set, specifically problem number 14. They calculated 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, they expected Vp to be 55.9 in/s and are confused about the discrepancy. Despite attempts to resolve the issue, they remain uncertain about how their result could be so far from the expected value. The discussion highlights the need for clarification on the calculations involved in the dynamics problem.
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!
 
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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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