Connecting Linear and Rotational Motion Practice Test

A fan blade of radius $$0.25$$ m is rotating at $$120$$ rad/s. It is then turned off and decelerates uniformly, coming to rest in $$8.0$$ s. What is the magnitude of the total linear acceleration of a point on the tip of the blade at the instant it is turned off ($$t=0$$)?

A disk of radius $$2R$$ rotates from rest about its center with a constant angular acceleration $$\alpha$$. Consider point A at radius $$R$$ and point B at radius $$2R$$. After a non-zero time $$t$$, what is the ratio of the magnitude of the total linear acceleration of point B to that of point A, $$a_B / a_A$$?