Hey guys, this is an example from a quiz last semester that im studying off of. However I cant figure out how to solve this question. Here is goes:(adsbygoogle = window.adsbygoogle || []).push({});

1. Block A, with Mass m, sits on top of a spring which is compressed 10 cm. When the spring is released, the block is launched to a maximum height of 2m above its starting point. Block B, with mass 2m, is placed on the same spring and launched 2m above the starting point.

a) how far should the same spring be compressed to launch block A 4m above its starting point?

b) how far should the same spring be compressed to launch block B to a max hight of 2m above its starting point.

For part A, I ended up with 40 cm. However Im pretty sure thats wrong. if someone can take me through the thought process and help id really appreciate it.

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# Homework Help: Work done by a Spring and such

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