# Homework Help: Circular Motion/Tension

1. Sep 28, 2009

### stressedout09

1. The problem statement, all variables and given/known data
Jill of the Jungle swings on a vine 6.6 m long. What is the tension in the vine if Jill, whose mass is 61 kg, is moving at 2.6 m/s when the vine is vertical?

2. Relevant equations
F=mv^2/r

3. The attempt at a solution
F=(61)(2.6^2)/6.6

Last edited: Sep 28, 2009
2. Sep 28, 2009

### rl.bhat

When Jill is just hanging on a vine, what is the tension in the vine?
When Jill is moving with a velocity, what additional tension is added to the vine?

3. Sep 28, 2009

### stressedout09

I'm sorry I still do not understand how to go about setting up the equation...I tried going over examples in my book for this type of circular motion but there does not seem to be any so I am beyond confused...I know that once I figure it out I will feel completely stupid but for now, I am just stumped. -_-

4. Sep 29, 2009

### rl.bhat

Total tension = tension due to centripetal force + tension due to weight.

5. Sep 29, 2009

### stressedout09

thank you SOOOO much...i'm such an idiot! -_-