A flywheel with a radius of (0.3)m starts from rest and accelerates with a constant angular acceleration of (0.6 rads^{-2}). Compute the magnitude of the tangential, radial acceleration of a point on its rim at the start.

Solution:

The flywheel has radius (0.3)m and starts from rest and accelerates with a  constant angular acceleration of (0.6 rads^{-2}).

The tangential acceleration $$ a_{tan}=r\alpha=(0.3)(0.6)=0.18m/s^2$$
Radial acceleration $$a_{rad}=0$$ since the flywheel starts from zero.