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7 Apr 2009 12:48:18 IST

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A BALL STRIKES GROUND WHOSE COEFFICIENT OF RESTITUTION IS e. THE BALL STRIKES THE GROUND AT AN ANGLE

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A BALL STRIKES GROUND WHOSE COEFFICIENT OF RESTITUTION IS e. THE BALL STRIKES THE GROUND AT AN ANGLE OF 'a' WITH VERTICAL. AT WHAT ANGLE WITH VERTICAL DOES THE BALL BOUNCE BACK?

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Prakhar Banga

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7 Apr 2009 12:58:02 IST

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Let its initial velocity be v sin a i - v cos a j.

Final velocity = v sin a i + e v cos a j.

So the final angle will be arctan( v sin a / (v cos a e) ) = arctan ( tan a / e)

tina

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7 Apr 2009 13:15:05 IST

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arctan ( tan a / e)

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