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.

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## 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.

- First, determine the relative velocity after collision (m/s).
- Next, determine the relative velocity before collision (m/s).
- Next, gather the formula from above = e = V2rel / V1rel.
- Finally, calculate the Coefficient of Restitution.
- 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