Why does a fully loaded passenger vehicle need a longer stopping distance than the same vehicle carrying only a few riders?

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1. Passenger weight has no measurable effect on stopping distance
2. Added passenger weight increases the vehicle's total mass, which takes more distance and time to slow down
3. More passengers means better traction from the added weight
4. Only the vehicle's speed affects stopping distance, not its load, since brake systems are rated for the vehicle's maximum capacity regardless

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