Physics

Problem

Two identical strings A and B each of length

1.0\,\text{m}

and linear mass density

2.0\times10^{-3}\,\text{kg m}^{-1}

are fixed on the same instrument. String A is under a tension of

100\,\text{N}

and vibrates in its fundamental mode. When both strings are plucked,

5

beats per second are heard, and string B is known to have the higher pitch. What is the tension in string B? a)

120\,\text{N}

91.6\,\text{N}

110\,\text{N}

104.5\,\text{N}