The number of oscillations in a given time (usually a second) is called the FREQUENCY (vibrations per second are given the unit of the HERTZ or Hz.). ... We would therefore expect the value of the constant for a given oscillation to depend on: u The restoring force per unit displacement u The mass of the oscillating body The pendulum: A simple pendulum consists of a heavy mass called a BOB suspended from a fixed support by a light string. ... The frequency f of the oscillations is the number of oscillations that occur per unit time and is the reciprocal of the period, f = 1/T. ......

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