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Homework Statement
A spring whose spring constant is ##k## is suspended from the ceiling. A block of mass ##M## hangs from the spring. A bullet of mass ##m## is fired vertically upward into the bottom of the block and stops inside of the block. The spring's max compression ##d## is measured.
Find an expression for the bullets speed in terms of ##k, M, m, d##.
Homework Equations
Conservation of energy in an isolated system and conservation of momentum.
The Attempt at a Solution
This question is pretty straightforward, but I was curious about something. When I found my final answer it didn't depend on gravitational energy at all. Why isn't there any gravitational energy to consider in this scenario?
Was the question just poorly made in the sense they didn't give a height?
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