Sedimentation for Analysis and Separation of Macromolecules
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چکیده
A ‘centrifugal force’ as experienced by particles in a centrifuge actually reflects the natural tendency of the particle to move in a straight line in the absence of external forces. If we view the experiment in the (fixed) reference frame of the laboratory, we observe that the particle is deflected from a linear trajectory by a centripetal force (directed toward the central axis of the rotor). However, when we consider the motion of the particle with respect to the (rotating) reference frame of the rotor, it appears that at any instant the particle experiences an outward or centrifugal force:
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