The disk is originally rotating at ${}_0=8ra\frac{d}{s}$ and is subjected to a constant angular acceleration of $8ra\frac{d}{s^2}.($Figure $1)$

Figure

$1$ of $1$

Determine the magnitude of the normal component of acceleration of point $B$ just after the wheel undergoes $4$ revolutions

Express your answer to three significant figures and include the appropriate units.

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Part C

Determine the magnitude of the tangential component of acceleration of point $B$ just after the wheel undergoes $4$ revolutions.

Express your answer to three significant figures and include the appropriate units.