Tension is likewise used to portray the force applied by the end of a three-dimensional, consistent material, for example, a pole or support part. Such a bar lengthens under tension. The measure of extension and the heap that will cause disappointment both to rely upon the force per cross-sectional territory as opposed to the force alone, so stress = pivotal force/cross-sectional zone is more helpful for designing purposes than tension. Stress is a 3x3 grid called a tensor, and a the σ11 component of the tension, the tensor is malleable force per zone, or tension force per zone, signified as a negative number for this component if the bar is being packed as opposed to extended.
String-like items in relativistic hypotheses, for example, the strings utilized in a few models of associations between quarks, or those utilized in the cutting edge string hypothesis, additionally have tension. These strings are examined regarding their reality sheet, and the energy is then commonly corresponding to the length of the string. Subsequently, the tension in such strings is free of the measure of extending.
A framework (or system) is in equilibrium when the sum of all the forces applied upon it sums up to zero.