Instant center of Velocity (check if I did it correctly)

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SUMMARY

The discussion focuses on calculating the velocities and angular velocities in a mechanical system involving points C, B, and D. The velocity of point C is given as 0.2 m/s downward. Participants emphasize the importance of using the correct distances for calculating the angular velocity of AB and the velocity at point D (vD). Additionally, they highlight the necessity of indicating direction when discussing velocities, particularly for vD, which is assumed to be at a 45-degree angle to the left.

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Homework Statement


Velocity of point C = 0.2 m/s going down
Find VB, VD, Angular velocity of BCD and Angular Velocity of AB

Homework Equations


V=wr
Sine and cosine law

The Attempt at a Solution



Drawing of the question

Please note that BCD is one link (L shape)
 
Last edited:
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Your work looks good except for your calculation of vD at the end of your notes. Did you use the correct distance?

Also, did you use the correct distance, r, when calculating ωAB?

Also, since the question asks for velocities rather than speeds, you might need to include directions for the velocities.
 
Looks right to me

Ah, I see I didst use the correct radius. Thanks!

Yea, I will put the direction in the end
 
Are you using the center of rotation of CBD to find vD?

Your red arrow representing the direction of vD is incorrect.
 
TSny said:
Are you using the center of rotation of CBD to find vD?

Your red arrow representing the direction of vD is incorrect.

ok, so I am using the relative velocity to find VD.

The red arrow for vd is Vd/B

Vd is at point D going left an angle of 45 degree (assuming)
 

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