A rope of mass 0.73 kg is stretched between two supports 31 m apart. If the tension in the rope is 1100.0 N, how long (in seconds) will it take a pulse to travel from one support to the other?

Answer 1

mass/unit length = .73/31 = .0235kg/m

speed = sqrt (T/u)
where T = tension in Newtons which is kg m/s^2
and
u is mass per unit length in kg/m
so
speed = sqrt (1100/.0235)
= 216 m/s
time = distance/speed
= 31/216 = .143 s
looks like piano wire :)