Dynamic problem 9 Mast Final-ch.1e (OPEN BUCKI Go uhrame blemID 5535972 EGR 245

Question

Dynamic problem

9 Mast Final-ch.1e (OPEN BUCKI Go uhrame blemID 5535972 EGR 245 Engineering Mechanics: Dynamics a previous l 2 at 6 l next. Time Remaining :15: Item 2 Part A The collar Cie pnned to red CD while on roe AB. Rod AB has an DatRrmina tha Rindly of rad D at th instant shawn maRsurad enuntarelackwsR laratian of Express your answer using three signi icant figures. En he angular velocity is counterclockwise and negative value if the angular velocity is clockvise. 15 add Submit Incorrect: One attempt remaining; Try Again Part B d CD a the Hngul Express you positi rclockwi d negati Figure 1 of 1 rad/s Submi My Answer Continue 43 PM Type here to search 55'2017

Explanation / Answer

part (A)

Starting from A,

Linear velocity of C, Vc = VA + a*wAB =0+3*5 = 15 m/sec

Similarly starting from B, Vc = VB + b*wCD= 0+ 3*wCD, but Vc = 15 m/sec

so wCD = 5 rad/sec,

part (B)

Similarly

Linear acceleration of C, Ac = AA + a*@AB =0+3*9 = 27 m/sec2,

where @AB = angular acceleration of AB = 9 rad/sec2

Similarly starting from B, Ac = AB + b*@CD= 0+ 3*@CD, but Vc = 27 m/sec2

so wCD = 9 rad/sec2,

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