In mechanics, a coplanar force system experiences different types of reactions between the point of contact and the supports. The support prevents the translational motion of the system by applying an equal and opposite force. It also prevents the rotation of the system by applying a couple of moments in the opposite direction. Roller support allows the structure to translate in only one direction. The reaction at the roller support will be a single force acting normal to the support. A pin support allows only the rotation of the beam, restricting its translational motion. It produces a reaction to the applied force in the plane perpendicular to the axis of the pin. This force can be resolved into its rectangular components. Fixed support restrains the structure from translating and rotating in any direction by providing two reaction forces and a moment to any applied force. The force Fx acts in the horizontal direction along the axis of the support, while Fy acts normal to the support.