# Acceleration of points on a wheel

I don't know why this problem is confusing me so much. Actually I do. I'll explain.

A car with wheels of radius R is accelerating at a constant rate. At what point on the tires is there the greatest acceleration, and what is this acceleration?

I've attempted this from different perspectives, and it would be useless to describe them all here, so I won't bother.

(This is NOT homework.)