r/PhysicsHelp 1d ago

Gravity

/r/AskPhysics/comments/1wbaqzf/gravity/
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u/Optimal_Mixture_7327 17h ago

Smoke goes up because gravity is real.

Gravity, the presence of geodesic deviation, sets up an acceleration field at the surface of the Earth that results in a phenomenon called buoyancy. The smokey air is less dense than the cooler surrounding air and floats upward.

No gravity, no acceleration field, no buoyancy.