Find the ratio of mass spring, oscillation problem

[th3plan]

Homework Statement

Two identical springs have attached mass M1 on the one and mass m2 on the other. We found that the psrings with mass m1 osciallates with a 2/5 frequency of the other spring.. Find the ratio of the mass of spring B to that of spring A ( M2/M1)

Can someone work this out, so i can learn how to do it, because i don't get which equations to use to get a M2/M1 ratio, i know one for frequency F2/F1 , but not this

 

[Kurdt]

What have you tried?

 

[tiny-tim]

i don't get which equations to use …

Hi th3plan!

Well, what equations do you know?

Tell us, and we'll tell you which one to use!

 

[physixguru]

What is frequency?
What is the magnitude of spring force?

 

[th3plan]

this is a simple harmonic problem, u don't need to know frequency or magnitude, because your just deriving an equation from it i believe, with the use of other equations

 

[Doc Al]

For the simple harmonic motion of a mass on a spring, how are frequency, mass, and spring constant related? Once you have that basic formula, set up a ratio.

 

[Kurdt]

this is a simple harmonic problem, u don't need to know frequency or magnitude, because your just deriving an equation from it i believe, with the use of other equations

So what have you tried? Nobody here will work this out for you since its not the policy of this forum to do your homework, but to help you with it.

See this page, it may help:

http://hyperphysics.phy-astr.gsu.edu/hbase/shm.html

 

[th3plan]

Of course i don't want you to do my homework. I don't learn anything .

This is what i would think to do. I know frequency is 2/5, so to use equation

F=1/2pi $$\sqrt{k/m}$$

 

[Doc Al]

That's all you need. Now plug in $f_1, m_1$ and compare with $f_2, m_2$.

 

[th3plan]

yes that what i was thinking to do :), just wanted to be sure