Sketching Parabolas

  • Due Sep 15, 2016 at 8:59am
  • Points 2
  • Questions 2
  • Available until Sep 15, 2016 at 8:59am
  • Time Limit None
  • Allowed Attempts Unlimited

Instructions

Watch the following video tutorial on the shape of a parabolic arc then take the quiz.

http://youtu.be/xQ85DfckyM4

[PDF of Slides]

Summary:

•To sketch a parabolic arc you pick the endpoints and the height of the apex; the position of the apex is between the endpoints.
•To find the points on each side of the apex you use the Fourth Down at Half Time rule.
•Sketching arcs in perspective requires drawing vertical lines as verticals and horizontal lines converging to a vanishing point.
•Sketching an arc is useful for checking the position of the apex in a jump.
•The shape of the arc may be distorted to change the emotional impact in a scene.
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