Tangential force unit conversion

[Crazymechanic]

Hi , if we have a rotating centrifuge at rpm "a" and we have the radius "b" of the centrifuge and then at the side i have a metal ball that weight's "c" I take the formula which you suggested me here F=ma where a=v2/r and out of that I get Newtons, how do i convert them to like pascals? Because i read that somewhere they use Newtons/square meter somewhere Newtons/square millimeter and that confuses me.

And would the calculus be different if i wanted to find out how much force on the side is exerted by a gas let's say than a solid like in this case a solid object?

Thanks.

 

[tiny-tim]

Hi Crazymechanic!

… I get Newtons, how do i convert them to like pascals? Because i read that somewhere they use Newtons/square meter somewhere Newtons/square millimeter and that confuses me.

A Pascal is a Newton per square metre …

it's the SI unit "derived" from the base units of Newton and metre, see http://en.wikipedia.org/wiki/SI_derived_unit

And would the calculus be different if i wanted to find out how much force on the side is exerted by a gas let's say than a solid like in this case a solid object?

Exactly the same.

 

[Crazymechanic]

Thanks Tim:)