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Not sure if this is perfectly a physics question:

A rope is wrapped around a cylinder of diameter D. The cylinder is slightly eccentric so that the distance between the axis of the cylinder and the axis of rotation is e. As the cylinder rotates, it pulls the rope. At t=0, the far end of the rope is at position 0.

What is the function of the rope position with respect to the angle of rotation of the cylinder? (This is not a homework question BTW)

enter image description here

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closed as too localized by David Z Nov 15 '11 at 21:01

This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.

This is Math! Epicycles et. al. – Georg Nov 15 '11 at 13:29
I thought physics was just math ? – Rocketmagnet Nov 15 '11 at 13:56
I just saw that You are a Senior "Robotics Design Engineer" This is basic engineering stuff! – Georg Nov 15 '11 at 14:07
I know. It's embarrassing. I have calculated an answer, I just can't believe my answer. – Rocketmagnet Nov 15 '11 at 14:13
This sounds exactly like a homework question, and in any case this is a site about concepts, not a site where you post problems for other people to do. Please edit the question to include the specific concept you're confused about. You could show what you've done, explain why it doesn't make sense, and ask about whether it's accurate. With those edits I would be very happy to reopen the question. – David Z Nov 15 '11 at 21:00