A ball is placed at one of the foci,
F
, of the ellipse below, and is rolled in the direction of point
P
. It keeps rolling, bouncing off the ellipse when it hits it.
1
2
3
4
5
6
7
8
-1
-2
-3
-4
-5
-6
-7
-8
1
2
3
4
5
6
7
8
-1
-2
-3
-4
-5
-6
-7
-8
P
F
How far will the ball have traveled by the time it returns to the point
F
?
units
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