(Savvas 17.2) Ch. 17.2 Properties of Mechanical Waves

Define the term 'Period' as it relates to mechanical waves.

• The time taken for one complete cycle of the wave to pass a given point.

• The distance between two consecutive crests of the wave.

• The maximum displacement of points on a wave from the rest position.

• The number of waves that pass a given point per second.

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Frequency, as it relates to mechanical waves, is defined as:

• The number of waves that pass a point in one second.

• The distance between two consecutive crests of a wave.

• The time it takes for one complete wave to pass a point.

• The height of the wave from its rest position.

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Define the term 'Wavelength' as it relates to mechanical waves.

• The distance between two consecutive crests or troughs in a wave

• The time it takes for one complete wave to pass a given point

• The number of waves that pass a given point in one second

• The height of the wave from the rest position

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Amplitude as it relates to mechanical waves is defined as:

• The maximum extent of a vibration or oscillation, measured from the position of equilibrium.

• The distance between two consecutive crests of a wave.

• The number of waves that pass a fixed point in unit time.

• The time taken for one complete cycle of vibration to pass a given point.

Is the following sentence true or false? A periodic motion repeats at regular time intervals.

• True

• False

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The time required for one cycle, a complete motion that returns to its starting point, is called the _______________.

• period

• frequency

• amplitude

• wavelength

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The number of complete cycles in a given period of time is the _______________ of a periodic motion.

• frequency

• amplitude

• wavelength

• velocity

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Circle the letter of each sentence that is true about frequency. a. Frequency is measured in cycles per second, or hertz. b. A wave’s frequency equals the frequency of the vibrating source producing it. c. Five cycles per minute is a frequency of five hertz. d. Any periodic motion has a frequency.

• a. Frequency is measured in cycles per second, or hertz.

• b. A wave’s frequency equals the frequency of the vibrating source producing it.

• c. Five cycles per minute is a frequency of five hertz.

• d. Any periodic motion has a frequency.

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The distance between a point on one wave and the same point on the next cycle of the wave is called _______________.

• wavelength

• frequency

• amplitude

• velocity

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How is wavelength determined for a longitudinal wave?

• By measuring the distance between two consecutive compressions or rarefactions

• By measuring the distance between two consecutive crests

• By measuring the distance between two consecutive troughs

• By measuring the frequency of the wave

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