A string of length 20 cm and linear mass density 040 g cm1 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 (15-E3), 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).


A. 002 s

Speed of the wave will be





So, the time required to reach the other end is




To produce the same wave, it will take 0.02 sec.


At half of the 0.02 sec i.e. 0.01 sec the wave will be at the other end of the string and it will be pointing downwards. The 2nd wave representation in the diagram is at t=0.01s.


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