Mechanical tension refers to the force that is applied to an object, causing it to stretch or elongate. This force can occur in various materials, such as metals, plastics, and textiles, and is a critical factor in engineering and construction. When an object is under tension, it experiences internal forces that work to resist the stretching, which can lead to changes in shape or size. In structures like bridges or cables, mechanical tension plays a vital role in maintaining stability and strength. Engineers must carefully calculate the tension in these materials to ensure they can withstand loads without failing. Understanding mechanical tension helps in designing safe and effective structures, such as suspension bridges and tension cables.