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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.