A string of mass 2.50kg is under a tension os 200N. The length of the stretched string is 20.0m. If the transverse jerk is struck at one end of the string, how long does the disturbance take to reach the other end?

Explanation

Given `T=200N,`length of string `l=20m` total mass of the string `=2.5kg`
`therefore` mass per unit lengthof the string
`m=2.5/20=0.125` kg `m^(-1)`
Now `v = sqrt(T/m)=sqrt(200/0.125)=40ms^(-1)`
Hence time taken by the transverse wave to reach other end
`t=l/v=20/40=0.5s.`