|
A buoyant force is an upward force of a fluid. Buoyant force is measured in Newtons. When one fluid that is denser (has more particles in it per unit volume) has another fluid in it that isn't as dense (that has not as many particles in it) , the less dense fluid will be pushed upward in the denser fluid. For example, helium will float in air because helium has less particles in it (per cubic cm) than air does. Helium is used in blimps so they will float in the air, providing entertainment for you. A picture of a blimp:  An experiment that shows buoyant force:  This experiment it shows how a buoyant force can help you, even if the object is too dense to float. This helps you by making the pail of rocks seem lighter when you put it in the bucket of water. The water is exerting an upward force on the bucket, making in seem lighter. The weight stays the same but the bucket seems lighter. |