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A phone cord is 4.75 m long. The cord has a mass of 0.200 kg. A transverse wave pulse is produced by plucking one end of the ta...Asked by baby
A telephone cord is 6.20 m long and has a mass of 0.220 kg. A transverse pulse is produced by plucking one end of the taut cord. The pulse makes four trips down and back along the cord in 0.830 s. What is the tension in the cord?
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Answered by
drwls
The wave makes 4 round trips in 0.83 s, so the wave speed is:
V = 8*6.2 m/0.83 s = 59.8 m/s
The mass per unit length is
s = 0.0355 kg/m
sqrt(T/s)= V
Then solve for T.
T = s * V^2 = 127 Newtons
V = 8*6.2 m/0.83 s = 59.8 m/s
The mass per unit length is
s = 0.0355 kg/m
sqrt(T/s)= V
Then solve for T.
T = s * V^2 = 127 Newtons