Question

Select the correct option.

• A. Line $\left(1\right)-\left(1\right)$ is along common normal direction.
• B. Line $\left(2\right)-\left(2\right)$ is along common tangent direction.
• C. Coefficient of restitution can be applied along the line $\left(1\right)-\left(1\right)$.
• D. All of the above are correct.

Answer 1

The correct option is D All of the above are correct.

As we know,


Along line of impact, which is common normal direction, coefficient of restitution can be applied and is given by
$e=\frac{\text{Velocity of seperation}}{\text{Velocity of approach}}$