Posted by Dan on Friday, October 30, 2009 at 6:26pm.
frequency=1/2pi *sqrt(k/mass)
and frequency is 1/period.
frequency= oscillations/second
f=14osc/18.5sec=0.76Hz
T= 1/f
T= 2pi/w
1/0.76Hz=2pi/w
cross multiply
w=2pi*0.76= 4.775 rad/s
w=sqrt(k/m)
square both sides
w^2=k/m
w^2 * m = k
k = w^2 * m
you have "w" and you have mass. Plug them in and find the spring constant. Don't forget to convert the mass from grams to kilograms.
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