When a balloon is rubbed against a material (such as wool or hair), it acquires an electrostatic charge. This charge creates a force between the balloon and the ceiling, causing the balloon to stick. This force is due to static electricity.
The upthrust exerted by surrounding air on the balloon.
As you pull down the balloon at the bottom of the model, the air pressure inside the balloon increases, causing the air to be pushed out through the straw. This creates a propelling force that makes the balloon move in the opposite direction.
Balloon boats move due to the escaping air from the balloon propelling the boat forward. When the air is released from the inflated balloon, it creates a force in the opposite direction, causing the boat to move in the direction of the escaping air.
A balloon rises because it is filled with a gas that is lighter than the surrounding air, typically helium or hot air. The lighter gas creates buoyant force, lifting the balloon off the ground.
This is the buoyancy force. Archimedes is credited with first formulating this into a mathematical principle: the buoyancy force of an object is equal to the weight of fluid it displaces. In the case of a hot air balloon, the "fluid" is the outside cool air and the balloon is displacing a volume of cool air equal to the volume of the inflated balloon. So you can say the buoyancy force F = V ρ g, where V is the volume of the inflated ballon, ρ is the outside air density, and g is gravity. A balloon can float because it is displacing this cool air with hot air which is less dense. The volume of hot air inside the balloon thus weighs less than the same volume of cold air outside the balloon. For a balloon to be float upwards, the buoyancy force has to be at least equal to the weight of the balloon (the balloon fabric, the gondola, the people, equipment and cargo, and the hot air inside). For example, for a balloon of 100,000 cubic foot volume (typical), with outside air at 20 deg C near sea level, the buoyancy force is about 7500 lbs. This force has to lift the gondola, people, equipment and of course the hot air inside the balloon, all of which have weight. By far the greatest percentage of that total weight is the heated air inside since there is so much of it.
The upthrust exerted by surrounding air on the balloon.
It rises because when thermal engery is in the balloon it makes an expansion that makes the balloon fly
When the gas (air) in a hot air balloon is heated it becomes less dense. This makes the balloon more buoyant so it rises.Because heating the air inside the balloon makes it less dense than the air surrounding the outside of the balloon, so it will rise.
Balloon boats move due to the escaping air from the balloon propelling the boat forward. When the air is released from the inflated balloon, it creates a force in the opposite direction, causing the boat to move in the direction of the escaping air.
As you pull down the balloon at the bottom of the model, the air pressure inside the balloon increases, causing the air to be pushed out through the straw. This creates a propelling force that makes the balloon move in the opposite direction.
A hot air balloon rises due to the principle of buoyancy. As the air inside the balloon is heated, it becomes less dense than the surrounding air, causing the balloon to float upwards. This effect is similar to how a helium balloon rises in the atmosphere.
A balloon rises because it is filled with a gas that is lighter than the surrounding air, typically helium or hot air. The lighter gas creates buoyant force, lifting the balloon off the ground.
If there is warm air in the balloon, cooler air makes the balloon rise and if there is cold air in the balloon warmer air makes the balloon fall.
a helium balloon is forced upward by buoyancy. a object is forced upward by a force equal to the weight of the fluid it displaces. this also applies to gases. the gas helium is lighter than average atmospheric air, that is that equal volumes of atmospheric air and helium do not weigh the same. This means that the volume displaced by the balloon is heavier than the balloon itself. since the air weighs more it applies more force upwards on the balloon than the balloon applies downwards on the air, therefore it rises. However, a helium balloon will not go down unless a force such as large air resistance (heavy wind etc.) is applied to it. hope this helps.
This is the buoyancy force. Archimedes is credited with first formulating this into a mathematical principle: the buoyancy force of an object is equal to the weight of fluid it displaces. In the case of a hot air balloon, the "fluid" is the outside cool air and the balloon is displacing a volume of cool air equal to the volume of the inflated balloon. So you can say the buoyancy force F = V ρ g, where V is the volume of the inflated ballon, ρ is the outside air density, and g is gravity. A balloon can float because it is displacing this cool air with hot air which is less dense. The volume of hot air inside the balloon thus weighs less than the same volume of cold air outside the balloon. For a balloon to be float upwards, the buoyancy force has to be at least equal to the weight of the balloon (the balloon fabric, the gondola, the people, equipment and cargo, and the hot air inside). For example, for a balloon of 100,000 cubic foot volume (typical), with outside air at 20 deg C near sea level, the buoyancy force is about 7500 lbs. This force has to lift the gondola, people, equipment and of course the hot air inside the balloon, all of which have weight. By far the greatest percentage of that total weight is the heated air inside since there is so much of it.
A balloon rocket moves forward due to the principle of action and reaction as outlined in Newton's Third Law of Motion. When the air is forced out of the balloon in one direction, the balloon is propelled forward in the opposite direction.
A balloon filled with a gas that is less dense than water, such as helium or hydrogen, will float on water due to the buoyant force acting on it. The gas inside the balloon displaces an amount of water equal in weight to the balloon, causing it to float.