Adding a mass on an oscillation causing a change in frequency

[kavipach]

Homework Statement

A thin uniform rod of mass m is suspended from one end and oscillates with a frequency f.
If a small sphere of mass 2m is attached to the other end, does the frequency increase or decrease?

Homework Equations

The Attempt at a Solution

I have reached a conclusion that the frequency would decrease but I am not sure exactly why. Is it because the amplitude would become bigger?

 

[diazona]

No, it's not because of the amplitude.

Is this talking about a pendulum? What do you know about pendulums? Any formulas?

 

[kavipach]

i know that pendulums work due to the concervation of energy but i don't understand how this could be about a pendulum.

 

[kavipach]

Unless the P.E becomes greater when mass and since P.E=K.E, K.E becomes greater. But i don't understand how this would change the frequency.

 

[rock.freak667]

Unless the P.E becomes greater when mass and since P.E=K.E, K.E becomes greater. But i don't understand how this would change the frequency.

What can you say about the period of a pendulum?

 

[Geezer]

kavipach: What is the equation for frequency of a pendulum?

If you look closely, there are only two variables in that equation. Is mass one of them?