Engineering Board Exam Reviewer · Physics · hard
A string 0.8 m long with a linear density of 0.01 kg/m is under a tension of 100 N. What is its fundamental frequency?
- 125.0 Hz
- 62.5 Hz
- 31.3 Hz
- 0.625 Hz
Answer
B. 62.5 Hz
Solution
Wave speed v = sqrt(T/ ) = sqrt(100/0.01) = 100 m/s. f1 = v/(2L) = 100/1.6 = 62.5 Hz.
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