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

Tension, T=200 N,
Length, ,=20.0 m , Mass ,M=2.50 kg
Mass per unit length, `mu=(250)/(20.0) kg m^(-1)=0.125 kgm^(-1)`
Wave velocity `v=sqrt((T)/(mu))=sqrt((200 N)/(0.125 kg m^(-1)))`
or `v=sqrt(1600) ms^(-1)=40 m s^(-1)`
Time, `t=(1)/(v)=(200)/(40)s=(1)/(2)s=0.5 s`