An overhead door is guided by wheels at
A
and
B
that roll in horizontal and vertical tracks. When
\theta =
30\deg
the velocity of wheel
A
is
1.5f(t)/(s)
to the left. Using a relative velocity analysis approach, determine a) the angular speed of the door. b) the velocity of
B
on the door. c) the velocity of end
D
on the door.