EGM 3400 and 3401 (circle one) NAME:_______________________ Spring 2007 Quiz 8 Open book/Closed notes – Time limit = 25 minutes The disk of radius R rolls without slipping at tpoint of contact A with an angular velocity of ωradians per second counterclockwise. The pin Cis at the center of the disk and the point B always rests on the inclined surface. If the aθis 120°, find the velocity of point B at this instant. he ngle Method 1: ICR Method ()()()()()tan 3033cos 60sin 6033313223cCBoooCBBBvRHRLHLHRRLvijLRLRRLvijLRωωωωωω=−=−=⇒=⇒=−⇒=−−−−⎛⎞=−−⎜⎟⎜⎟−⎝⎠rrrrrrMethod 2: Use relative motion and the fact the component of the velocity of B normal to the inclined plane is 0. ///3322223223133222BCB CCB CBCB CBCBCBCBBCBCBBCvv
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