If gravity pulls everything down why does smoke rise?

Answer 1

Smoke is a very large number of tiny specs of dust floating in the air. These specs of dust do indeed fall down by gravity through the air they are in, but very slowly. What happens much faster, however, is that the air itself moves.
In the case of smoke created from fire, the surrounding air is hot, and less dense. The colder denser air surrounding it falls under gravity and forces the hot air to rise, taking the smoke with it.

Answer 2

Smoke is made up of small light particles. At formation, it is hot and so is the air around it. As hot air rises cooler air moves in to take its place thus giving rise to convection current. The smoke particle moves with this current. If the force of the current is large enough it will throw the smoke particles to far reaching vertical heights which will be most obvious should the force of the convection current be directed upwards.
When the smoke particles reach the highest possible vertical height, far away from its source - which definitely is cooler, it cools down and becomes free particles only under the influence of the normal air current and so drifts freely - no longer under the influence of the added force of convection current present at it source.
As the smoke particle definitely has weight it will be under the influence of the force of gravity so that it either remains trapped in the troposphere balanced under the force of gravity and the force of the wind or any other possible force that might be, or eventually land on some surface as sooth.
So it remains true that gravity pulls everything down towards the earth surface and for anything to escape the earths gravitational pull it must acquire the earth's escape velocity... at least.

Answer 3

Gravity indeed pulls everything down but gravity isn't the only force in town. Smoke is heated and it has less density than the surrounding air making it lighter. So the hot smoke rises and the cool air falls to replace it.

Answer 4

Smoke has less density than air, since it is hot. Gravity pulls down everything including air, so it pulls air more than smoke. So smoke rises

Answer 5

Did you know heat rises, hot air, containing hot smoke particles rise. When the smoke cools down the particles come down to earth because of gravity.

Answer 6

Hi there. It depends on the size of the smoke molecules. Gravity draws things down, but the deeper you go the more packed the moecules get - so the smoke will settle at a level in the air of equal density. Heavier particles (such as soot, wood ash) will settle on the ground eventually, as they are heavier than air. It is the same effect as a helium balloon - pure helium is much less dense than the air at ground level, so if unrestrained will travel up until it finds its own level.
Cheers, Steve.

Answer 7

The debris interior the smoke ARE being pulled down by skill of gravity. even nevertheless they could be microscopic, they nonetheless have weight. Weight is the effectof gravity. whether, warm air will upward push. The thermal capability reasons air molecules to head quicker than chillier ones, and so as that they have got greater collisions with one yet another and additionally pass extra. the internet results of that's that air which has been heated rises. Smoke debris in this heat air (won't be in a position of have smoke without hearth, won't be in a position of have hearth without warmth!) are carried upwards by skill of the pass of the warmth air molecules. so as that they have got an upward tension appearing on them to boot as a downward tension because of gravity. The upward tension is in many situations greater desirable (gravity on debris is amazingly susceptible) so smoke rises. You have been spectacular once you reported each little thing is pulled down, yet you need to bear in mind that there are additionally forces performing upwards!

Answer 8

Smoke has a density that is lower than air (especially since it is heated.)The buoyant force of the air is stronger than the pull of gravity on smoke and as a result, it rises up.

Answer 9

kinda the same idea as if you put a big rock in a bucket of water, the rock goes to the bottom and the water rises.. the density of the rock is greater so it goes on bottom. but if you put in rubber ducky the duck floats above the water, the water's density is greater so it stays on bottom.

now lets change that around a bit, lets make the water the air around us.. now lets make the smoke the rubber ducky.. what happens? air stays lower, smoke floats on top.

gravity does pull everything down, but just because air can't be seen doesn't mean it isnt there..so the things with less density than air just get piled up on top of the air.. like a stack of books.

Answer 10

The upthrust on the smoke is stronger than the gravitational pull on it hence a net upward movement.
If we fall... gravity> upthrust.. so down we go.