Two identical billiard balls undergo an oblique elastic collision. Initially, one of the balls is stationary. If the initially stationary ball after collision moves in a direction which makes an angle of `37^(@)` with direction of initial motion of the moving ball, then the angle through which initially moving ball will be deflected isA. `37^(@)`B. `60^(@)`C. `53^(@)`D. `gt53^(@)`

Two identical billiard balls undergo an oblique elastic collision. Ini

1.	Two identical billiard balls undergo an oblique elastic collision. Initially, one of the balls is stationary. If the initially stationary ball after collision moves in a direction which makes an angle of `37^(@)` with direction of initial motion of the moving ball, then the angle through which initially moving ball will be deflected isA. `37^(@)`B. `60^(@)`C. `53^(@)`D. `gt53^(@)`
Answer» Correct Answer - C When two indentical balls undergo elastic oblique collisions with one of them stationary, the after collision they will move at right angles to each other. Alternative method I: Just like in previous question, you can proceed using centre of mass frame of reference. Alternative method II: Using basic equation of conservation of momentum, conservation of energy and coefficient of restitution, you can have the desired result.

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