A gas filled balloon moves up. Is the upward force acting on it larger or smaller than
the force of gravity?

can i get answer for this please
thank you

When a gas-filled balloon rises, the upward force acting on it is indeed larger than the force of gravity pulling it down. This phenomenon can be explained through the principles of buoyancy and density.

Understanding Forces in Play

To grasp why the balloon ascends, we need to look at two main forces: the force of gravity and the buoyant force. The force of gravity is the weight of the balloon, which depends on its mass and the acceleration due to gravity. The buoyant force, on the other hand, is the upward force exerted by the surrounding air on the balloon.

Buoyant Force Explained

The buoyant force is determined by the volume of air displaced by the balloon. According to Archimedes' principle, this force is equal to the weight of the air displaced. If the weight of the air displaced is greater than the weight of the balloon itself, the balloon will rise. Conversely, if the weight of the balloon is greater, it will sink.

Density Comparison

The key to understanding this situation lies in the concept of density. A gas-filled balloon is typically less dense than the surrounding air. This difference in density creates a situation where the buoyant force exceeds the gravitational force acting on the balloon. When the balloon is released, it rises because the upward force (buoyant force) is greater than the downward force (gravity).

Illustrative Example

• Imagine a helium balloon: Helium is lighter than air. When you release it, the weight of the air that the balloon displaces is greater than the weight of the helium inside the balloon, causing it to ascend.
• Consider a heavier balloon: If you were to fill a balloon with water instead of gas, it would sink because the weight of the water-filled balloon would be greater than the buoyant force acting on it.

Conclusion on Forces

In summary, when a gas-filled balloon rises, the upward buoyant force is indeed larger than the gravitational force acting on it. This balance of forces is what allows the balloon to ascend through the air, demonstrating the fascinating principles of physics at work in our everyday lives.