# A mass ‘m’ moves with a velocity ‘v’ and collides elastically with another identical mass. After collision the Ist mass…

Q: A mass ‘m’ moves with a velocity ‘v’ and collides elastically with another identical mass. After collision the Ist mass moves with velocity v/√3 in a direction perpendicular to the initial direction of motion. Find the speed of the 2nd mass after collision

(a)$\displaystyle \frac{2}{\sqrt{3}}v$

(b) $\displaystyle \frac{v}{\sqrt{3}}$

(c) v

(d) √3 v

Ans: (a)