Figure showa a string of linear mass density `1.0gcm^-1 on which a wave pulse is travelling. Find the time taken by the pulse in travelling through a distance of 50 cm on the string. Take `g=10 ms^-2`.

Explanation

The tension in the string is `F=mg=10N. The mass per unit lent is mu=1.0 g cm^-1=0.1kgm^-1.` The wave velocity is therefoe `v=sqrt(Fmu)=sqrt((10N)/(0.1kgm^-1)=10ms^-1`. The time taken by the pulse in travellling through 50 cm is therefore `0.05s.