four forces

The four forces are applied force, normal force, tension force and gravitatational force. Applied force is just how it sounds you applie an amount of force on an object. Normal force is when you have a normal force from an object going up. Tension force is when there is two object that are going at each other with the same force and go against each other. Gravitatational force is how it sounds as well it is when you have a force pulling down on an object.