Plot the trajectories of the points of the wheel rolling without slipping on the
rail. Consider cases where the points are at a distance from the wheel axis:
r > R, r = R, r < R. Find the acceleration of these points if the wheel axis is
moving at a constant speed v. Find the radius of curvature of the trajectory
of a point located in the highest and lowest positions at a distance r ̸= R from
the wheel axis.