1. Select a motion axis from the Mechanism Tree or directly on the model. Right-click and choose from the shortcut menu. The MOTION AXIS dialog box opens.
2. Type a value for the Minimum Limit and the Maximum Limit.
Drag your model to make sure the limits provide the expected range of movement.
3. Click the Dynamic properties button.
4. Select the Coefficient of Restitution check box and enter a value.