Fundamentals of Musculoskeletal Biomechanics(2)
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loginBiomechanics is the field of study which applies fundamental principles of mechanics to biological problems. Mass, time, and length are the basic variables of the biomechanics, and they are scalar quantities which can be described by a magnitude. Force and moment are vector quantities that take direction (or line) of action into account in addition to the magnitude. Time rate of change of position is velocity, and time rate of change of velocity is acceleration. Force and moment (torque) are the two important concepts at the basis of biomechanics which give forth to linear and rotational motion, respectively. The magnitude of the forces is equal to mass times accelera-tion. The magnitude of the moment is equal to the force times its moment arm.
