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Applies to questions of primarily educational value - not only questions that arise from actual homework assignments, but any question where it is preferable to guide the asker to the answer rather than giving it away outright. Please READ THE GUIDANCE IN META before asking homework-like questions.

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College Board Problem: Conservation of Momentum -> Conservation of Energy in a Spring

In my AP Physics C class today, we ran into a problem written by College Board whose answer we disputed. The problem is as such : A block of mass $M=5.0 \ \mathrm{kg}$ is hanging at equilibrium from …
Sebastian Pojman-Malo's user avatar