# Homework Help: Centrifuge question

1. Oct 20, 2007

### Paulbird20

Force required to accelerate 5.0g object at 11000 g's. (in a centrifuge)
But it does not give me rpm or diameter so how can i calculate the force?

Im assuming it really doesnt matter that its in a centrifuge? Any leads would help

2. Oct 20, 2007

### PhanthomJay

Write down the equation of force using Newton 2. What is the value of the centripetal acceleration?

3. Oct 20, 2007

### Paulbird20

F= M* A

I tried converting the acceleration out of G's by dividing 11000 by 9.8 then times it by 5... Do i need to convert the mass out of grams and into KG?

4. Oct 20, 2007

### PhanthomJay

A "G" is shorthand for the acceleration of gravity, 1 G is 9.8m/s^2 acceleration. You've got 11000 G's...you should be multiplying, not dividing. And yes, if you want your answer in the basic SI force unit of Newtons, mass must be expressed in kilograms.

5. Oct 20, 2007

### Paulbird20

Awsome i got it. Thank you so much phanthom jay i was dividing the 11000/ 9.8 rather than multiplying ;)