Question

One sphere collides with another sphere of same mass at rest inelastically. If the value of coefficient of restitution is $\frac{1}{3}$, the ratio of their speeds after collision shall be

• A. 1 : 2
• B. 2 : 1
• C. 1 : 3
• D. 3 : 1

Answer 1

The correct option is A 1 : 2

$\frac{v_1}{v_2}=\frac{1-e}{1+e}=\frac{1-\frac{1}{3}}{1+\frac{1}{3}}=\frac{\frac{2}{3}}{\frac{4}{3}}=\frac{1}{2}$