One reason different materials are used to produce different items is because all materials are not the same. Their differences can often be defined by characteristics such as strength, hardness, and ductility. These traits are known as mechanicalproperties.
The types of mechanical properties that are assessed depend upon the material being considered. Wood, for example, is not commonly tested for its elasticity but it may be tested for hardness and strength. Mechanical properties are usually measured based on the amount of stress or force it takes to break or tear a material.
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