VELOCITY
Text: The time rate of change of displacement. This is often expressed as V, x, or dx/vt; velocity leads displacement by 90 degrees in time. Typical units for velocity are inches/second or millimeters/second, zero-to-peak. Velocity measurements are usually obtained with a mechanically activated velocity transducer and are used to evaluate machine housing and other structural response characteristics. Electronic integration of a velocity displacement signal.
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