Waves, Sound and Light: Wave Basics
Wave Basics: Audio Guided Solution
Problem 19:
Anna Litical ties a rope to a tree, stands 7.2 m away, and vibrates the rope up and down with 28 complete cycles in 5.0 seconds. The resulting standing wave pattern is shown in the diagram at the right. Use this information and the diagram to determine the amplitude, wavelength, frequency and speed.
Audio Guided Solution
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amplitude: 0.3 m
wavelength: 4.8 m
frequency: 5.6 Hz
speed: 27 m/s
wavelength: 4.8 m
frequency: 5.6 Hz
speed: 27 m/s
Habits of an Effective Problem Solver
- Read the problem carefully and develop a mental picture of the physical situation. If necessary, sketch a simple diagram of the physical situation to help you visualize it.
- Identify the known and unknown quantities and record in an organized manner, often times they can be recorded on the diagram itself. Equate given values to the symbols used to represent the corresponding quantity (e.g., v = 12.8 m/s, λ = 4.52 m, f = ???).
- Use physics formulas and conceptual reasoning to plot a strategy for solving for the unknown quantity.
- Identify the appropriate formula(s) to use.
- Perform substitutions and algebraic manipulations in order to solve for the unknown quantity.
Read About It!
Get more information on the topic of Waves at The Physics Classroom Tutorial.
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