Friday

July 25, 2014

July 25, 2014

Posted by **Brienne** on Sunday, December 2, 2012 at 8:43am.

1. What is the tension in the wire?

2. Calculate the tension for a 89-g wire.

---

I don't know how to begin this problem, because I don't know how to go about tension in regards to waves. I only ever used tension in the T=m*g format before. And I'm sure I could figure out part 2 if I knew how to do part 1. Thank you for any help!

- physics -
**drwls**, Sunday, December 2, 2012 at 9:26am1. The wire tension can be derived from the wave speed, which is

V = 5.9/0.087 = 67.8 m/s,

and the mass per unit length of wire,

sigma = 0.079/5.9 = 1.338*10^-2 kg/m

Now solve the wave speed equation

V = sqrt(T/sigma)

to get the tension in N

T = V^2*sigma = 61.5 N

2. Use the same formulas with a different wire mass.

- physics -
**Brienne**, Sunday, December 2, 2012 at 10:29amThank you so much!

**Related Questions**

physics - A 5.2 m wire with a mass of 86 g is attached to the mast of a sailboat...

Waves & Tension - A 5.9 m wire with a mass of 79 g is attached to the mast of a ...

Physics - A 2.2m of steel wire hangs vertically down from a support. A 1.5m ...

Physics - A purple beam is hinged to a wall to hold up a blue sign. The beam has...

College Physics - One end of a 14 m long wire having a total mass of .8000 kg is...

physics - A special prototype model aeroplane of mass 400g has a control wire ...

physics - A special prototype model aeroplane of mass 400g has a control wire ...

algebra - a piece of wire measuring 20 feet is attached to a telephone pole as a...

Physics - A weight of 40N was attached to the end of a wire during modulus ...

Physics - A horizontal wire is held taut by a mass M hanging from its end over a...