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19 Vibrations & Waves

19 Vibrations & Waves. Homework: RQs: 2, 11, 12, 13, 16, 18. Problem 1. Simple Pendulum. T = period f = frequency f = 1/T L = length M = mass L x 4  T x 2 T mass independent. Waves. moving vibrations Speed = frequency x length Speed same as frequency & length change, e.g. sound.

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19 Vibrations & Waves

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  1. 19 Vibrations & Waves • Homework: • RQs: 2, 11, 12, 13, 16, 18. Problem 1.

  2. Simple Pendulum • T = period • f = frequency • f = 1/T • L = length • M = mass • L x 4  T x 2 • T mass independent

  3. Waves • moving vibrations • Speed = frequency x length • Speed same as frequency & length change, e.g. sound

  4. Types of Waves • Transverse Longitudinal(elastic, light) (elastic, sound) • Video on slinky

  5. Bow & shock waves • Speed (boat, plane) exceeds wave speed • Angle change with speed • Video of shock waves – wiki • Video bullwhip

  6. doppler effect • Pitch change due to motion • Increase on approach • Decrease with separation

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