What term describes determining a single vector from two or more vectors by vector addition?

The term that describes determining a single vector from two or more vectors through vector addition is vector composition. This process involves combining multiple vectors to find their resultant vector, which represents the overall effect of those vectors. For example, if you have two forces acting on an object at different angles, vector composition allows you to calculate the total force acting on the object by adding these forces together.

Vector composition is fundamental in biomechanics, as it helps to analyze complex movements and forces acting on the body. Accurately determining resultant vectors is essential for understanding how different forces interact and influence motion or stability.

Other terms in the options refer to specific concepts that are not related to the addition of vectors. Torque, for instance, involves the rotational effect of a force applied at a distance from an axis, while torsion pertains to twisting forces. Tension refers to the force exerted by a string, cable, or similar object when it is pulled tight, but it does not define the process of combining multiple vectors. Thus, vector composition is the most appropriate term for this concept.