A vertical spring with k = 490 N/m is standing on the ground. You are holding a 5.0 kg block just above the spring, not quite touching it.(adsbygoogle = window.adsbygoogle || []).push({});

A)How far does the spring compress if you let go of the block suddenly?

B)How far does the spring compress if you slowly lower the block to the point where you can remove your hand without disturbing it?

A) This part was simple enough,

U(potential) = U(spring)

where the h in potential is the height from where the spring would compress to...

mg(deltaS) = 1/2 k*(deltaS)^2

plug #'s and solve for deltaS. 0.2m

B)I don't know where to start this any differently. 0.2m isn't the correct answer. I just don't know how this differs...

help?

Thanks

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# Homework Help: Block placed on spring

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