(2)Normal force: Just like tension force the normal force is also contact force Both tension and normal forces originate with the atoms of each body ---each atom exerts a force on its neighbor. They belong to electromagnetic forces(2) Normal force : Just like tension force, the normal force is also contact force. Both tension and normal forces originate with the atoms of each body --- each atom exerts a force on its neighbor. They belong to electromagnetic forces. N'  − N 