Buoyant Force

What is Buoyant Force?

The upward force that fluids exert(create) on all matter.

Does Density effect buoyancy? Explain.The greater the density the less the buoyancy

Buoyant Force and Fluid Pressure

Water exerts fluid pressure on all sides of an object.

Pressure increases as depth increases. (bottom is greater than the top.

Prediction Time: True or False

1. The shape of the object helps determine whether the object will float.

2. Something made of steel cannot float in water.

3.Whenever an object floats depends on its weight.

Archimedes’ Principle

The buoyant force is equal to the weight of the fluid the object displaces or takes the place of.

If an object displaces 250 mL of water then the weight of that volume displaced is about 2.5 N-so the buoyant force is 2.5N

Measuring Force

Newton: The newton (symbol: N) is the unit of measurement for FORCE.

Spring Scale is the tool used.

Force: the push or a pull.

Story about the Apple falling from the tree:

The story of the apple:

Newton was sitting under an apple tree, an apple fell on his head, and he suddenly thought of the Universal Law of Gravitation.

What is pressure?

In physics, pressure is defined as the force over a given area. Given the same force, the smaller the area of contact, the more pressure is applied. The formula used to describe and calculate pressure is:

Pressure = Force ÷ Area

or P = F/A