(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A body of unknown mass is attached to an ideal spring with force constant 123 N/m. It is found to vibrate with a frequency of 5.65 Hz.

Find the mass of the object.

2. Relevant equations

F=-kx

F=ma

No idea what else...

3. The attempt at a solution

No idea where to start. I get to:

ma=-kx

m = (-123x) / (a)

and can't think where to go from there. I've tried:

1cycle=4 max displacments (x), so

f=5.65Hz = 22.6 cycles of x /s

thereby returning x as .25, but that's dead wrong. Any ideas? I'm totally lost.

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# Homework Help: Relating force constant and frequency to mass

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