Fundamental Frequency of a String (The First Harmonic)

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Presentation transcript:

Fundamental Frequency of a String (The First Harmonic) Elliott

rearrange to make the fundamental frequency, f0 the subject of the formula:

Worked Example A string is 2.3 m long between two fixed point. A length of 2.50 m has a mass 53.0 g. It is under a tension of 25.6 N. Calculate the first harmonic, and give your answer to an appropriate number of significant figures.

Check Your Progress A length of wire has a mass of 1.25 g for a length of 1.60 m. In an experiment to measure mains frequency that is shown above, it is required to fit between two fixed points 1.15 m apart and is placed between the poles of a magnet. It is found to resonate at a first harmonic with a frequency of 50.0 Hz. (a) Calculate the tension needed. (b) Calculate the speed of the waves in this wire.

Answer