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Harmonic motion : Calculating period, frequency and angular frequency

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The fan blades of a jet engine make one thousand revolutions in a time of 50.0 ms. Determine
(a) The period in seconds and
(b) The frequency in Hz of the rotational motion
(c) What is the angular frequency of the blade?

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The angular frequency is noted in the solution.

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50ms is milliseconds, 1 thousandth of a second.

a. The period is the time for one revolution so ...

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