Hello there!(adsbygoogle = window.adsbygoogle || []).push({});

I am not sure how to get started with this one:

Two half shell rods are welded in a v-shape together and attached to a vertikal axis which rotates with 2 rounds per minute. The angle between the rods is 80 degress. In the rods, there a two balls on each side which are in a certain height (counting from the low end of the v) resting in a equilibrium. How great is the height?

So my guess is, that the centrifugal force has to be the same than the gravity force:

[tex] F_g=F_z = m*g = m*\omega^2*r \\ \omega=2*f\pi*f =12.57 \frac{rad}{sec} [/tex]

So the radius would be :

[tex] r= \frac{g}{\omega^2} \\ \mbox{the height is then} h=\frac{r}{\tan40} = 0.074 m [/tex]

However, it is supposed to be 0,088 m.

Honestly, I am totally clueless about this one and I would be happy if someone could lead me to the solution!

Thank you very much in advance!

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# The principle of a governor

**Physics Forums | Science Articles, Homework Help, Discussion**