Question: A block of mass .05 kg is pulled .3 m from its equilibrium position and released. The spring constant is 5 N/m(adsbygoogle = window.adsbygoogle || []).push({});

What is the total energy of the block-spring system?

My book says E = K + U or E = (1/2)mv^2 + (1/2)kx^2. My book also says E_total = (1/2)kA(amplitude)^2. Which formula is correct? I've just solved for the E_total equation and I found the answer to be .75 J. Can anyone confirm this answer for me? My work is below...

(1/2)(5)(.3^2) = .75 J

Thanks

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# Spring SMH

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