What is momentum and impulse?
GeneralClass 12AllAnswered 27 Mar 2026
Answer
Momentum is the quantity of motion (p = mv), while impulse is the change in momentum. Impulse is calculated as the force applied to an object multiplied by the time duration: Impulse = F × Δt. According to the impulse-momentum theorem, impulse equals the change in momentum: F × Δt = Δp. This relationship explains why airbags and crumple zones in cars work they increase the time of impact, reducing the force experienced.
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