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Linear mass density of string is 5\times 10^{-2}\; kg/m is under tension of 80 N. calculate velocity of the pulse travelling

  • Option 1)

    40 m/s

  • Option 2)

    4 m/s

  • Option 3)

    20 m/s

  • Option 4)

    0.4 m/s

 

Answers (1)

best_answer

  v = \sqrt \frac{T}{m} = \sqrt \frac{80}{5 X 10 ^{-2}} = 40 m/s

 

Speed of wave on string -

v= \sqrt{\frac{T}{\mu }}
 

- wherein

T= Tension in the string

\mu = linear mass density

 

 

 


Option 1)

40 m/s

This is correct.

Option 2)

4 m/s

This is incorrect.

Option 3)

20 m/s

This is incorrect.

Option 4)

0.4 m/s

This is incorrect.

Posted by

prateek

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