Required information

Problem $15\mathrm{.}063-$ Rods in a linkage system

The angular velocity of rod $DE$ is a constant $30$ rad$/$s clockwise.

Problem $15\mathrm{.}063.$b $-$ Velocity of the midpoint of the rod

Determine the velocity of the midpoint of rod $BD$ in the position shown.

The velocity of the midpoint of rod $BD$ is $\frac{m}{s}$ and the angle is $$