Simple Harmonic Motion and frequency of vibration

AI Thread Summary
To determine the frequency of vibration when a car hits a bump, the combined mass of the person and car must be considered, totaling 1103 kg. The spring compression of 3.3 cm indicates the displacement in the system. Understanding the principles of Simple Harmonic Motion (SHM) is essential, particularly the relationship between mass, spring constant, and frequency. The frequency can be calculated using the formula for SHM, which requires knowledge of the spring constant derived from the given compression. Familiarity with these concepts will facilitate solving the problem effectively.
metalmagik
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When a 63 kg person climbs into a 1040 kg car, the car's springs compress vertically by 3.3 cm. What will be the frequency of vibration when the car hits a bump? Ignore damping.

Here is the FBD I have drawn:

http://img276.imageshack.us/img276/6189/fbdcc2.png

Im not even sure if this is really right...

I really just don't know where to begin with this. I added the masses together...and I know I have an x value of 3.3 cm. I don't know how to conceptualize this so that the FBD makes sense...any tips or hints are appreciated
 
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Are you familiar with the Simple Harmonic Motion of a mass on a spring? If not, that's what you should study before tackling this problem. Here's a start: http://hyperphysics.phy-astr.gsu.edu/hbase/shm.html"
 
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