Question
Why does path length not matter for gravity in energy problems?
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Answer
Gravity is conservative, so only vertical height change matters.
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Question
What is the high-yield speed formula for a frictionless drop from rest?
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Answer
v=2gh; it is independent of mass.
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Question
Why are conservation-of-energy questions so common on the MCAT?
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Answer
They avoid messy force-time analysis in ramps, coasters, pendulums, and springs.
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Question
Spring launch. A spring with k=200N/m compressed 0.1m launches a 0.5-kg cart frictionlessly.
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Answer
Final speed is 2m/s; spring PE converts fully into kinetic energy.
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