The rodOA rotates clockwise with a constant angular

velocity of $6ra\frac{d}{s}.$ Two pin$-$connected slider blocks,

located at $B,$ move freely on $OA$ and the curved rod

whose shape is a limacon described by the

equation $r=200(2-cos)mm.($Figure $1)$

Figure

Part A

Determine the speed of the slider blocks at the instant $=145.$

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

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