Problem:
Irodov, problem 1.52., it says that acceleration is constant in magnitude and pointing permanently towards the center of the wheel. `vrai ou faux?

A wheel rolls on a horizontal surface without slipping. Also rolling is the acceleration vector (red). It has two components. Tangential acceleration (orange) changes the magnitude of the velocity vector of a point on the rim of the wheel. Normal acceleration (green) changes its direction.

Irodov’s solution manual

Animation by mathany