# Standard Rolling Friction

with μ_{r} the coefficient of rolling friction, R_{i} the distance of the contact point from the center of mass and ω_{i}, the unit angular velocity vector of the object at the contact point.

EDEM provides the option to include a component of torque arising from rolling friction in geometry torque and power calculations. This component of torque is neglected (Off) by default.

You can select to include or neglect this component of torque by clicking the icon on the selected Particle to Geometry contact model. The checkbox is unchecked by default, and selecting the **Apply the torque resulting from the rolling friction model to the geometry elements** includes the torque which is the same as EDEM v2017 and earlier.

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