$($#$3)$

If when $=0,$ point A has a downhill velocity of $2\frac{m}{s}.$

Find the angular velocity of the arm $AB$ and the velocity and direction of block B$.$

$($#$4)$

Note that ABD and DE are not necessarily perpendicular $*$

This will require some geometry. Both the law of sines and cosines.

Block $B$ is able to slide vertically in a slot.

Arm DE is pinned and able to rotate about pointe.

If we are given that the the angular velocity of arm DE is $3ra\frac{d}{s}$ clockwise, Find the angular velocity of Arm ABD and the velocity of point A$.$