/usr/include/freefoam/forces/ is in libfreefoam-dev 0.1.0+dfsg-1build1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/freefoam/forces/IOforceCoeffs.H
/usr/include/freefoam/forces/IOforces.H
/usr/include/freefoam/forces/fixedAxis.H
/usr/include/freefoam/forces/fixedLine.H
/usr/include/freefoam/forces/fixedOrientation.H
/usr/include/freefoam/forces/fixedPlane.H
/usr/include/freefoam/forces/fixedPoint.H
/usr/include/freefoam/forces/forceCoeffs.H
/usr/include/freefoam/forces/forceCoeffsFunctionObject.H
/usr/include/freefoam/forces/forces.H
/usr/include/freefoam/forces/forcesFunctionObject.H
/usr/include/freefoam/forces/linearAxialAngularSpring.H
/usr/include/freefoam/forces/linearSpring.H
/usr/include/freefoam/forces/sixDoFRigidBodyDisplacementPointPatchVectorField.H
/usr/include/freefoam/forces/sixDoFRigidBodyMotion.H
/usr/include/freefoam/forces/sixDoFRigidBodyMotionConstraint.H
/usr/include/freefoam/forces/sixDoFRigidBodyMotionI.H
/usr/include/freefoam/forces/sixDoFRigidBodyMotionRestraint.H
/usr/include/freefoam/forces/sixDoFRigidBodyMotionState.H
/usr/include/freefoam/forces/sixDoFRigidBodyMotionStateI.H
/usr/include/freefoam/forces/sphericalAngularSpring.H
/usr/include/freefoam/forces/tabulatedAxialAngularSpring.H
/usr/include/freefoam/forces/uncoupledSixDoFRigidBodyDisplacementPointPatchVectorField.H