A fisherman noticed that a float makes 30 oscillations in 15 seconds. The distance between two consecutive crests is 2 m. What is the period and frequency of the wave? What is the wave speed?
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Ответ:
Period T = 0.5 s
Frequency F = 2 Hz
Wave speed V = 4 m/s
Explanation:
Given that the
Number of oscillations = 30
Time taken = 15 seconds
The distance between two consecutive crests is called wavelength
Wavelength = 2m
Period is the ratio of time and the number of oscillations
Period T = 15/30 = 0.5 seconds
Frequency F is the reciprocal of period. That is,
F = 1/T
F = 1/0.5 = 2Hz
Wave speed V is the product of frequency and wavelength
V = 2 × 2 = 4m/s
Ответ: