Weight

Weight is the gravitational force that the Earth exerts on bodies that are close to its surface. Suppose a body of mass m is close to the surface of the

Contact forces

The contact forces are those for which the body that exerts the force is in direct contact with the body on which this force acts. Although the only forces of

Normal Force

The normal force (N) is the component of the contact force that is perpendicular to the surface that an object contacts. When an object is placed on another, the electrical

Friction

The surface of objects is usually rough. This is the reason why when two objects are in contact and one of them is in relative motion (or begins to move)

Tension

Tension is the force transmitted by a rope, a string, a cable, a wire, a chain, etc … when one pulls from its ends. The tension is directed along the

Spring force

A compressed or stretched spring exerts a restoring force on a mass attached to it. The restoring force always acts opposite to the deformation of the spring to bring the