07/13/15

My question is Q 2.7 on the screenshot here: https://www.physicsforums.com/attachments/kk-2-7-jpg.72173/
I think a) is (b-y)^2 + x^2 = L^2; the second derivative of this can be taken to get the actual accelerations.  I can't get b) though. Have been stuck on this for a while! Thank you!!
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