Answer :

As per the question, the end A is free so, antinode must be formed there.


In case of one free end, it is open to air, so air pressure must be present on that end and now,


pressure and displacement are out of phase, so it creates an antinode.


4


Now the movable support is pushed to the right by 10 m, so that the joint is placed on the


pulley, and a node will be formed there.



Tension and velocity remains same.


As wavelength reduces, frequency increases.


So,


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