- #1

ubiquinone

- 43

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Question: A 2.00 kg mass, which is attached to a string of radius [tex]r[/tex], travels in a vertical circle. When the string makes an angle of [tex]\theta=52^o[/tex] with the horizontal, the speed of the mass is [tex]2.31m/s[/tex] and the tension in the string is [tex]31.6N[/tex]. Calculate the radius of the string, [tex]r[/tex].

Diagram

Code:

```
Center
------------+--------------
\ 52 degrees
\
\
\ string
\
\
\
O mass
```

I'm really not sure on how to solve it, but I'm guessing the vertical component of the force of tension - the weight = the vertical component of the centripetal force. Am I close? If not, may someone please give me a hand. Thank You.