P16_002.PDF

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Chapter 16 - 16.2
2. (a) The problem describes the time taken to execute one cycle of the motion. The period is T =0 . 75 s.
(b) Frequency is simply the reciprocal of the period: f =1 /T
≈
1 . 3 Hz, where the SI unit abbreviation
Hz stands for Hertz, which means a cycle-per-second.
(c) Since 2 π radians are equivalent to a cycle, the angular frequency ω (in radians-per-second) is related
to frequency f by ω =2 πf so that ω
≈
8 . 4 rad/s.

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