# Multiple-Choice Doozie

## Homework Statement ## Homework Equations ## The Attempt at a Solution

The way I understood is it is by taking ma and setting it equal to mv^2/r and solving for v. With this I got answer choice number 9, sqrt(glsinTHETA). But it's wrong. Can anyone direct me in the right direction to solving this deceptively easy problem? Thanks in advance.

Hootenanny
Staff Emeritus
Gold Member

## Homework Statement ## Homework Equations ## The Attempt at a Solution

The way I understood is it is by taking ma and setting it equal to mv^2/r and solving for v. With this I got answer choice number 9, sqrt(glsinTHETA). But it's wrong. Can anyone direct me in the right direction to solving this deceptively easy problem? Thanks in advance.
You're on the right lines. However, you incorrectly assume that the tension in the string is mg.

You're on the right lines. However, you incorrectly assume that the tension in the string is mg.
So you're saying that I set mv^2/r equal g/cosTHETA ?

Hootenanny
Staff Emeritus