Physics - Wave on String Question with Solution | TestHub

Velocity of transverse wave

$v=\sqrt{\frac{T}{\mu }}$

where,  T = tension in the string = 200 N

μ= mass per unit length

$=\frac{\text{Mass}}{\text{Length}}=\frac{2·50}{20}=0·125\text{kg/m}$

$v=\sqrt{\frac{200}{0·125}}=\sqrt{1600}=40\text{m/s}$

Time taken by the disturbance to reach the other end

$t=\frac{l}{v}=\frac{20}{40}=0·50\text{s}$