Here are the classes, structs, unions and interfaces with brief descriptions:

ForceFieldSchemaPhysxForceFieldAPI	Force field base class that simply specifies the position and enables or disables the ForceField
ForceFieldSchemaPhysxForceFieldConicalAPI	A conical force field that attracts and/or repels rigid bodies from a central point, but not outside of the cone angle limit, depending on the function coefficients
ForceFieldSchemaPhysxForceFieldDragAPI	A force field that slows rigid bodies by generating a force that is opposite to their velocity direction using the forumula f = -linear * v - square * v^2
ForceFieldSchemaPhysxForceFieldLinearAPI	A linear force field that attracts and/or repels rigid bodies from a line, defined by a point and direction vector, depending on the function coefficients
ForceFieldSchemaPhysxForceFieldNoiseAPI	A force field that adds randomized motion to a rigid body
ForceFieldSchemaPhysxForceFieldPlanarAPI	A planar force field that attracts and/or repels rigid bodies from a plane, defined by a point and normal vector, depending on the function coefficients
ForceFieldSchemaPhysxForceFieldRingAPI	A force field that applies forces to rotate rigid bodies around a ring, defined by a normal axis through the center of the ring and radius from that axis
ForceFieldSchemaPhysxForceFieldSphericalAPI	A spherical force field that attracts and/or repels rigid bodies from a central point depending on the function coefficients
ForceFieldSchemaPhysxForceFieldSpinAPI	A force field that applies forces to rotate rigid bodies around a line, defined by a spin axis, and varies with the function coefficients
ForceFieldSchemaPhysxForceFieldWindAPI	A force field that simulates an unsteady wind that pushes rigid bodies
ForceFieldSchemaTokensType	ForceFieldSchemaTokens provides static, efficient TfTokens for use in all public USD API