Falling Time

  • 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 which discusses how far objects travel when they fall. Then scroll down to the bottom of the page to take the quiz.

http://youtu.be/B-jPniTPTD4

[PDF of Slides]

Summary:

•In Straight-Ahead Action you start from the first key, then create the next key, etc.
•Everything falls with the same timing and spacing (if air resistance is negligible).
•After one frame the distance fallen is about the width of a pencil; after two frames it’s about the width of two fingers.
•The distance fallen may be looked up in a table or calculated with a simple formula.
•The fallen distance table may also be used when planning the total length of a scene.
Have a question? Go here.

 

Optional: Listen to the Jingle Cats sing Silent Night:

http://www.youtube.com/watch?v=d9LqRl7tqf4

 

Falling Time Table (24 fps)

Time (seconds)

Frames

Distance fallen from apex

1/24

1

1/3 inch

1/12

2

1 1/3 inches

1/8

3

3 inches

1/6

4

5 1/3 inches

¼

6

1 foot

1/3

8

1 ¾ feet

½

12

4 feet

2/3

16

7 feet

¾

18

9 feet

1

24

16 feet

This table is for 24 fps; to convert to 30 fps multiply the time and the distance by 0.8.
For example, for 12 frames the time fallen is 0.4 seconds and the distance fallen is 3.2 feet.

The formula to compute the distance fallen (for 24 fps) is:
(Distance in inches) = (Number of Frames) x (Number of Frames) x (1/3 inch)
To convert to 30 fps, multiply the calculated distance by 0.8.

Only registered, enrolled users can take graded quizzes