http://www.ck12.org Chapter 11. Wave Motion and Sound
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- Reread the difference betweentransverseandlongitudinalwaves. For each of the following types of waves,
tell what type it is and why. (Include a sketch for each.)- sound waves
- water waves in the wake of a boat
- a vibrating string on a guitar
- a swinging jump rope
- the vibrating surface of a drum
- the “wave” done by spectators at a sports event
- slowly moving traffic jams
- A mass is oscillating up and down on a spring. Below is a graph of its vertical position as a function of time.
a. Determine the
a. amplitude,
b. period and
c. frequency.
b. What is the amplitude att=32 seconds?
c. At what times is the mass momentarily at rest? How do you know?
d. Velocity is defined as change in position over time. Can you see that would be the slope of this graph?
(slope = rise over run and in this case the ’rise’ is position and the ’run’ is time). Find the instantaneous
speed att=20 sec.Answers1..
2. a. 8 m; 20 s ; 0.05 Hz; b. –4 m c.∼2.3 m/s