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A string of length 20 cm and linear mass...

A string of length 20 cm and linear mass density `0.4 g//cm ` is fixed at both ends and is kept under a tension of 16 N. A wave pulse is produced at t=0 near an end as shown in figure which travels towards the other end. (a) When will the string have the shape shown in the figure again? (b) Sketch the shape of the string at a time half of that found in part (a).

Text Solution

Verified by Experts

velocity of the wave,
`V=sqrt(((T)/(mu)))=sqrt(((16xx10^(5)))/(0.4))=2000 cm//s`
time taken to reach to the other end `=(20)/(200)=0.01 s.` time taken to see the pulse again in the original position `=0.01xx2=0.02s`.
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