The angular velocity of the disk is defined by

$=(7t^2+4)ra\frac{d}{s},$ where $t$ is in seconds.

$($Figure $1)$

Determine the magnitude of the velocity of point $A$ on the disk when $t=0\mathrm{.}5s.$

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

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Part B

Determine the magnitude of the acceleration of point $A$ on the disk when $t=0\mathrm{.}5s.$

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

Incorrect; Try Again; $27$ attempts remaining

Figure

$1$ of $1$

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