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  4. A string of mass 2.5 kg is under a tension of 200 N . The length of the stretched string is 20.0 m . If the transverse jerk is struck at one end of the string. How long does the disturbance take to reach the other end?

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Q. A string of mass $2.5 \, kg$ is under a tension of $200 \, N$ . The length of the stretched string is $20.0 \, m$ . If the transverse jerk is struck at one end of the string. How long does the disturbance take to reach the other end?

NTA AbhyasNTA Abhyas 2022

Solution:

$V=\sqrt{\frac{T}{m}}$
$V=\sqrt{\frac{200}{0 .125}}$
$V=40 \, ms^{- 1}$
$t=\frac{d}{V}$
$t=\frac{20}{40}$
$t=0.5 \, s$