Angular motion diagram
The purpose of an angular motion diagram is
to understand the relationship between the angular position (q)
the angular velocity (w)
and the angular acceleration (a).
Steps:
-
Pick a point on the edge and mark its position
at equal time intervals. Then draw a line from those points
to the center. You should have pie wedges that are a constant size
for a constant rotation, are increasing for something that is speeding
up, and decreasing for something that is slowing down.
-
Draw angular velocity vectors (labeled with
w) to show
the direction it is rotating and roughly how fast.
-
Draw an angular acceleration vector (labeled
with a)
to show the direction it is accelerating (same as w
for speeding up, zero for constance rotation, and opposite w
for slowing down.)