calculate magnitude, direction of velocity of roller at B...

[Guest]

The end A of the link in a guide has a constant downward velocity of 3 m/s as shown in the diagram. For the instant where the link AB makes an angle of 75 degrees with the vertical guide, calculate the magnitude and direction of the velocity of the roller at B, the magnitude and direction of velocity of the centre of the link AB, and the angular velocity of the link AB. Is the velocity at B also constant?

 

[tkhunny]

You should clarify that velocity. Is it 2 or 3?

If we call C the corner, then tan(A) = BC/AC
With a little help from Pythagoras, we have \(\displaystyle \L\,BC\, =\, \sqrt{200^{2}\, -\, AC^{2}}\)

Are we getting anywhere?