Pressure on a button with 30N force and 1cm radius

[alsemmelink]

1. A vertical force of 30N is applied uniformly to a flat button with a radius of 1cm that is lying on a table. Estimate the pressure applied to the button



2. P=F/A



3. P=F/A= 30/(3.14)(r)^2

 

[tiny-tim]

Welcome to PF!

Hi alsemmelink! Welcome to PF!

(try using the X² tag just above the Reply box )

P=F/A= 30/(3.14)(r)^2

That's the correct formula …

so what answer do you get (and remember to be careful about the units)?