# Homework Help: Proving Centripetal Force

1. Feb 15, 2010

### magicjambon

Hi there, sorry if this is not in the right section, but i have to do an investigation, i have chosen to prove f=mrw2. I will be using a rotational air table, and this the handheld whirly string and mass experiemnt - sorry to be vague. basically i am not the best physicist so i would very much appreciate if anyone could tell me what variable to change, and the consequent desired effect in my endevour to prove the equation. I am confused. Thanks

2. Mar 2, 2010

### magicjambon

Can somebody please tell me how i can prove f=mrw? i have rotational air table and a manual method available. Can i for each experiment change the variables of the equation and show the force change and show how it complies? For instance in one experiment i will alter mass, another i will alter radius and the last angular velocity? Thanks

3. Mar 2, 2010

### PhanthomJay

The proof is in the calculus; the lab results compare your measurements with the calculated ones. Better check that equation though before you compare anything. Altering mass, radius, and angular velocity is a very good idea....

4. Mar 2, 2010

### magicjambon

thanks for your reply, in relation to checking the equation - im not sure what you mean sorry

5. Mar 2, 2010

### PhanthomJay

In post 2 I guess you made a typo error. F = m(w^2)r.

6. Mar 3, 2010

### magicjambon

ahh right thanks