# Find the acceleration at 4000rpm!

1. Oct 11, 2009

### thedarkone80

1. The problem statement, all variables and given/known data
A typical laboratory centrifuge rotates at 4000 rpm. Test tubes have to be placed into a centrifuge very carefully because of the very large accelerations.What is the acceleration at the end of a test tube that is 10 cm from the axis of rotation?

2. Relevant equations
No Clue

3. The attempt at a solution
I know that the 10cm we are given isnt a radius, so i have no idea where we are to start.

2. Oct 11, 2009

### Senjai

If you're in school, and have a textbook, i would suggest looking into Circular Motion and Gravitation, my textbook even has an example of the question your asking.

3. Oct 11, 2009

### thedarkone80

In not at school, my textbook doesnt have an example of it, i just need an equation for the work.

4. Oct 11, 2009

### hover

Your textbook would have an example. Your probably not looking in the right place. I'll give you a jumpstart. You need this equation to solve it. a=rw^2. you should be able to figure the rest out.

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