Question

A mass $m_1$ of 100 kg travelling with a uniform velocity of 5 m/s along a line collides with a stationary mass $m_2$ of 1000 kg. After the collision, both the masses travel together with the same velocity. The coefficient of restitution is

• A. 0.6
• B. 0.1
• C. 0.01
• D. 0

Answer 1

The correct option is D 0

Coefficient of restitution,

$e=\frac{\text{Relative Speed After Collision}}{\text{Relative Speed Before Collision}}$

After collision, both the masses move with same velocity. So, there is zero relative velocity between them,

$\therefore e=\frac{0}{5}=0$