Enter the relative velocity after collision (m/s) and the relative velocity before collision (m/s) into the Calculator. The calculator will evaluate the Coefficient of Restitution.

## Coefficient of Restitution Formula

e = V2rel / V1rel

Variables:

• e is the Coefficient of Restitution ()
• V2rel is the relative velocity after collision (m/s)
• V1rel is the relative velocity before collision (m/s)

To calculate the Coefficient of Restitution, divide the velocity after the collision by the velocity before the collision.

## How to Calculate the Coefficient of Restitution?

The following steps outline how to calculate the Coefficient of Restitution.

1. First, determine the relative velocity after collision (m/s).
2. Next, determine the relative velocity before collision (m/s).
3. Next, gather the formula from above = e = V2rel / V1rel.
4. Finally, calculate the Coefficient of Restitution.
5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem :

Use the following variables as an example problem to test your knowledge.

relative velocity after collision (m/s) = 35

relative velocity before collision (m/s) = 60