If the length of a piano wire is 1 m and mass 20 gm, and it is stretched by a force by a
force of 200N then the fundamental frequency of sound waves produced by the piano
will be??
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Answer:
M = 2.50 kg
T = 200 N
l = 20.0 m
Mass per unit length, μ=M/l=2.50/20=0.125Kgm
−1
v= T/μ
= 200/0.125
= 1600
=40 m/s
∴ Time taken by the disturbance to reach the other end,
t=l/v=20/40=0.5s
Explanation:
hope it will help you
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