Momentum, Energy, and Simple Systems (HSC SSCE Physics): Flashcards

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Momentum
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Momentum formula

p=mv\vec{p} = m\vec{v}

Momentum units

kgms1\text{kg} \cdot \text{m} \cdot \text{s}^{-1}

Momentum quantity type

Vector

Momentum direction

Same as velocity direction

Newton's 2nd law (momentum form)

Fnet=ΔpΔt\vec{F}_{\text{net}} = \frac{\Delta \vec{p}}{\Delta t}

Conservation of momentum law

Total momentum in isolated system is constant

Conservation of momentum equation

pinitial=pfinal\sum \vec{p}_{\text{initial}} = \sum \vec{p}_{\text{final}}

Newton's 3rd law & momentum

ΔpA=ΔpB\Delta \vec{p}_A = -\Delta \vec{p}_B

2D momentum conservation

Apply separately in x and y directions

Common momentum exam error

Not converting mass to kg

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