Consider the disk in $($Figure $1).$ The angular acceleration of the disk is defined by $=(3t^2+18)ra\frac{d}{s^2},$ where $t$ is in seconds. The disk is originally rotating at ${}_0=12ra\frac{d}{s}.$

Figure

$1$ of $1$

Part A

Determine the magnitude of the velocity of point $A$ on the disk when $t=2s$

Express your answer in meters per second to three significant figures.

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$q,$ Request Answer

Part B

Determine the magnitudes of the $n$ and $t$ components of acceleration of point $A$ on the disk when $t=2s.$

Express your answers in meters per square second using three significant figures separated by a comma.

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