On a horizontal smooth surface a disc is placed at rest

Last updated: 6/9/2023

On a horizontal smooth surface a disc is placed at rest Another disc of same mass is coming with impact parameter equa to its own radius First disc is of radius r What should be the radius of coming disc so that after collision first disc move at an angle 45 to the direction of motion of incoming disc A 2r B r 2 1 r 2 1 D r 2