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what does momentum mean?
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GPT-5 mini
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Short answer — it depends on context:
1) Physics meaning
- Momentum is a measure of how hard it is to stop a moving object. For ordinary (non‑relativistic) objects momentum p = m·v (mass times velocity).
- It is a vector: it points in the same direction as the velocity. SI units: kilogram·metre/second (kg·m/s).
- Key facts: momentum is conserved in an isolated system (total p before = total p after). Impulse (J = F·Δt) changes momentum: J = Δp.
- Intuition/example: a heavy truck at slow speed can have the same or more momentum than a fast bicycle; the truck is harder to stop.
2) Everyday meaning
- “Momentum” is used metaphorically to mean growing strength, progress, or drive in an activity (e.g., a campaign gaining momentum).
Optional advanced note: at speeds close to light, p = γ m v (γ is the Lorentz factor).
1) Physics meaning
- Momentum is a measure of how hard it is to stop a moving object. For ordinary (non‑relativistic) objects momentum p = m·v (mass times velocity).
- It is a vector: it points in the same direction as the velocity. SI units: kilogram·metre/second (kg·m/s).
- Key facts: momentum is conserved in an isolated system (total p before = total p after). Impulse (J = F·Δt) changes momentum: J = Δp.
- Intuition/example: a heavy truck at slow speed can have the same or more momentum than a fast bicycle; the truck is harder to stop.
2) Everyday meaning
- “Momentum” is used metaphorically to mean growing strength, progress, or drive in an activity (e.g., a campaign gaining momentum).
Optional advanced note: at speeds close to light, p = γ m v (γ is the Lorentz factor).
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