Finding the Instantaneous Center of Rotation for Constant Angular Velocity

[385sk117]

Homework Statement

At the instant shown, bar AB has a constant angular velocity of 25 rad/s counterclockwise. Dtermine at that instant a) the angular velocity of the rectangular plate FBDH, b) the velocity of point F

Homework Equations

Va = Vb + Wba x Ra/b

The Attempt at a Solution

Found Vb with the above formula which equals to 507.5j. And i think i should use the instantaneous centre of rotation method but i don't know how to find it.
Can anyone help me to solve this problem?

 

[tiny-tim]

Found Vb with the above formula which equals to 507.5j. And i think i should use the instantaneous centre of rotation method but i don't know how to find it.
Can anyone help me to solve this problem?

Hi 385sk117!

Do you mean you don't know how to find the instantaneous centre of rotation?

You know that B is moving perpendicular to AB, and D is moving perpendicular to DE.