Problem $15\mathrm{.}071-$ A rod connecting a rolling wheel and a moving collar

The $80-$ mm $-$radius wheel shown rolls to the left with a velocity of $920m\frac{m}{s}.$ The distance $AD$ is $50$ mm $.$

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Problem $15\mathrm{.}071.$a $-$ Velocity of the collar and the angular velocity of the rod

Determine the velocity of the collar and the angular velocity of rod $AB$ when $=0.$

When $=0,$ the velocity of the collar is

$m\frac{m}{s}($Click to select$)$ Y

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When $=0,$ the angular velocity of rod $AB$ is $ra\frac{d}{s}.$