Question

A string has a linear mass density 4 kg/m  . The string is attached to the ceiling and a flag of mass 64kg hangs from the other end.

if a transverse pulse travels up the string toward the ceiling.

At what speed does the pulse travel?

Answer 1

The speed of the pulse is the wave speed:

$$v=\sqrt{\frac{T}{\mu}}=\sqrt{\frac{mg}{\mu}}=12.5\text{ m/s}.$$