A clear tour of momentum: how mass and velocity shape motion, collisions, and safety across everyday and cosmic scales.
Momentum is mass times velocity, carrying direction and showing why heavy or fast objects resist stopping.
In isolated systems, total momentum stays fixed while momentum shifts between bodies during interactions.
Collisions range from elastic (energy conserved) to perfectly inelastic (objects stick), with real events in between.
Impulse links force and time; extending contact time reduces peak forces in crashes via crumple zones, belts, and airbags.
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