Support Reactions Support reactions are the forces that act on a rigid body at points of contact to prevent it from moving or sliding relative to the surfac...
Support Reactions
Support reactions are the forces that act on a rigid body at points of contact to prevent it from moving or sliding relative to the surface of a rigid body. These forces are responsible for maintaining the equilibrium of the rigid body, which is a state in which the body is not moving and has a constant shape.
The three types of support reactions are:
Normal reaction: This force acts perpendicular to the surface of the rigid body and has the same magnitude as the normal force (which is the force acting perpendicular to the surface of the body that is trying to push the body away).
Shear reaction: This force acts parallel to the surface of the rigid body and has the same magnitude as the shear force (which is the force acting parallel to the surface of the body that is trying to slide the body along the surface).
Tangential reaction: This force acts along the surface of the rigid body and has the same magnitude as the tangential force (which is the force acting along the surface of the body that is trying to slide the body along the surface).
The net effect of these support reactions is to maintain the equilibrium of the rigid body. If the normal, shear, and tangential forces are equal in magnitude, the body will be in equilibrium. If any of these forces are different in magnitude, the body will experience a net force and will move or slide relative to the surface of the rigid body.
Examples of support reactions include the forces exerted by the walls of a container, the force of gravity on an object on the Earth's surface, and the force of air resistance on an airplane