Centripetal Force Calc Question

[junkie_ball]

Homework Statement

Calculate the centripetal force required to rotate a 3Kg object in a circle at a radius of 3m at one revolution per second?

Ok for some reason i find circular motion a real struggle i have come up with an answer for this question but looking for some reassurance i am on the right lines.

Homework Equations

Fc = MV²/r

V = 2$\pi$r/t

The Attempt at a Solution

First i need to work out the velocity so i use V = 2$\pi$r/t

V = (2$\pi$ x 3)/1
V = 18.85 m/s¹

With this i then used the Fc = MV²/r equation to work out the centripetal force as below.

Fc = (3 x 18.85²)/3
Fc = 355.32 N

As i said at the beginning of this post i lack confidence in circular motion so would appreciate a pointer in the right direction if i have gone astray.

 

[Quinzio]

It's just fine.

 

[junkie_ball]

It's just fine.

Thanks for the reassurance.