In the arrangement shown in figure (15-E6), the string has a mass of 45 g. How much time will it take for a transverse disturbance produced at the floor to reach the pulley? Take g = 10 m s2.


002 s

The mass of the string is 4.5g =0.0045 kg.


The length of the string is 2.25m


The mass density will be,



The force on the string is,



Now the speed of the wave will be,





SO, the time taken will be,





1