Question

9:44 83 D. 58% Х HW 16 View Policies Current Attempt in Progress Determine the angular velocity (positive if counterclockwise, negative if clockwise) of link BC for the instant indicated. In case (a), the center of the disk is a fixed pivot, while in case (b), the disk rolls without slipping on the horizontal surface. In both cases, the disk has clockwise angular velocity w = 2.1 rad/s. Neglect the small distance of pin A from the edge of the disk. The radius r = 820 mm. с с r A 2r A 2r B B 00 KO (a (b) Answers: (a) WBC= rad/s (b) WBC rad/s 0 <

Answer 1

cccc B 2.1 rad se BC ہے ४ Case a velocity of Pt. A=8w VA= .82% 2.1=1.722m Since AB is a rigid roda VA = VB = 10722 m/ sec. since AB & B C & WBC - VB 1.722= .82 Case-b Since it is a rolling motion - Instantaneous center of Rotation is point of contact » VA = 2row (along AB) " AB is rigid > VA = VB=20w WB C = VB = 20 = 4.2 rad/ seco A B y