`A B\ a n d\ C D` are two chords of a circle such that `A B=6\ c m ,\ C D=12\ c m\ a n d\ A B || C D`. If the distance between `A B\ a n d\ C D` is `3\ c m ,` find the radius of the circle.

Answer

3

Explanation

The x-component of velocity remains same while the y-component of velocity is halved and gets reversed.

so, the ball will cover twice the distance in x-direct compare to before collision
As we use `x=2(1.5-x)`
`x=3-2x`
`3x=3`
`x=1 m`