Sphere to Multi-Curve Contact represents contact forces between a sphere and curves. Sphere to Multi-Curve Contact supports spring, damping and friction forces. Action geometry is represented using a sphere defined with a center point and radius. The base contact surface is represented using a multi-curve of a Curveset as shown in Surface Based on Multiple Curves in the Motion Theory Reference. A Curveset on the base body must be specified before creating the contact. Sphere to Multi-Curve Contact calculates its force based on the penetration and relative velocities between the sphere and base surface at the contact point. The action force is applied at the contact point on the action sphere and an equal and opposite reaction force is applied at the same position on the base surface. Sphere to Multi-curve contact is only available for contact between rigid bodies.