Question

A billiard ball of mass $M$ moving with velocity $v_1$ collides with another ball of the same mass but at rest. If the collision is elastic the angle of divergence after the collision is

• A. $0^o$
• B. ${30}^o$
• C. ${90}^o$
• D. ${45}^o$

Answer 1

The correct option is C ${90}^o$

$0^o$ If collision is head on
${90}^o$ If collision is oblique