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  4. A ball moving with a certain velocity hits another identical ball at rest. If the plane is frictionless and collision is an elastic oblique collision, the angle between the directions in which the balls move after the collision, will be

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Q. A ball moving with a certain velocity hits another identical ball at rest. If the plane is frictionless and collision is an elastic oblique collision, the angle between the directions in which the balls move after the collision, will be

NTA AbhyasNTA Abhyas 2020

Solution:

This is an example of elastic oblique collision. When a moving body collides obliquely with another identical body in rest, then during elastic collision, the angle of divergence will be $90^\circ $