A flywheel with a radius of 0.200m starts from rest and accelerates with a constant angular acceleration of 0.900rad/s2. H) Compute the magnitude of the radial acceleration of a point on its rim after it has turned through 120.0. I am not understanding what radical acceleration means.. Solution Compute the magnitude of the radial acceleration of a point on its rim after it has turned through 120.0 degrees ?f.