collisions

show that if a billiard ball is heated inside an ellipse from focus it will always pass along the major axis.(after a finite time)

5 Answers

neglect friction and all collisions are elastic

Hint: The normal at any point P bisects the angle between the lines SP and S'P where S and S' are the two foci.

got it sir...

when ball is hited from S1 it passes through S2,then after hitting wall it passes through S1

so after a finite time it will be going along the st. line joining S1 and S2 ie major axis////

GOOD CONCEPT..........

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