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

What is the potential energy of the spring?

mass=.52 kg

velocity=-6.54sin(20.1t)

time=40.84 seconds

amplitude=.33 meters

angular frequency=20.1

2. Relevant equations

U =1/2kx^{2}

3. The attempt at a solution

I used x=Acos(wt) and got .2 meters for x. I know this is right.I don't know how to find k.

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# What is the potential energy of the spring?

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