Question

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

• A. ${30}^o$
• B. ${60}^o$
• C. ${90}^o$
• D. ${120}^o$

Answer 1

Answer: (C)

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 $\text{9}{\text{0}}^{\text{o}}\text{.}$