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Physicsnoob90

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## Homework Statement

A disk of radius 16 cm rotating around a fixed axis at its center is accelerated from rest to an angular velocity of +13rev/min in +0.27 rev.

(A )Find the angular acceleration (in rad/s^2), which is assumed to be constant, during this time interval.

(B) what is the total acceleration (magnitude and direction) of the particle located altho the end of this time interval

## Homework Equations

## The Attempt at a Solution

(a) after converting and using ωf^2 = ωi^2+2αΘ, i got α=0.546 rad/s^2

I don't know how to start (B). Can someone help me?