Question #103007

A phone cord is 6.75 m long. The cord has

a mass of 0.247 kg. A transverse wave pulse is produced by plucking one end of the taut

cord. The pulse makes four trips down and

back along the cord in 0.748 s.

What is the tension in the cord?

Answer in units of N.

a mass of 0.247 kg. A transverse wave pulse is produced by plucking one end of the taut

cord. The pulse makes four trips down and

back along the cord in 0.748 s.

What is the tension in the cord?

Answer in units of N.

Expert's answer

The expression for mass per unit length of cord is

The pulse makes four trips down and back along the cord. So the pulse covered the 8 times of length of cord. The expression for velocity of pulse is

The expression for velocity of pulse in terms of tension and mass per unit length is

"\\frac{8( 6.75)}{0.748}=\\sqrt{\\frac{T}{\\frac{0.247}{ 6.75}}}"

"T=191\\ N"

Learn more about our help with Assignments: MechanicsRelativity

## Comments

## Leave a comment