A comprehensive cheat sheet covering key concepts, formulas, and problem-solving tips for the Momentum unit in high school physics. Includes linear momentum, impulse, conservation of momentum, and elastic vs. inelastic collisions. It’s written based on how I was taught, so some variables or notation might differ slightly from other resources. Perfect for quick reference during study or review before tests and exams.
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p=mv
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Δp=mΔv=FnetΔt
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Σpi=Σpf
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Coordinate System needed
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Draw it out if you need it
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Remember you have to do x and y comp
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List out all the values on the side write them all out - label angles too
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i.e. mA=5.0kg | vAix=4.0m/s | vAfx=2.0m/s cos 30° | vAfy=2.0m/s sin 30° | mB=7.0kg | mB=0m/s | vBf=?
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When dealing with inelastic/stick together objects, remember they are one thing - combined
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A state is a possible configuration that a system can exist in accordance with the laws of physics.
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Phase space contains all the configuration.
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Deterministic is when you know where you came from (the past) and where you are going next (the future) if you know where you are at the present.
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Momentum - p - unit - kg • m/s
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Impulse - Δp = change in momentum
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Elastic Collisions
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p and Ek are conserved - perfectly bounce off of each other
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Σpi=Σpf and ΣEki = ΣEkf
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unrealistic irl - nothing is lost thru sound/heat/etc.
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Inelastic Collisions
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p is conserved, Ek isn't - stick together
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Σpi=Σpf and ΣEki ≠ ΣEkf
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Explosion
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explodes into multiple pieces
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Σpi=Σpf and ΣEki ≠ ΣEkf
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