Fluids and Pressure

Any substance that can easily flows and therefore can easily change shape.

• Fluid

• Liquid

• Gas

• Solid

A person wearing boots and a person wearing stilleto heels stand on a wooden floor. They both have the same weight. Which person exerts a greater pressure on the floor?

• boots because they have a larger surface area

• stiletto heels because they have a larger surface area

• boots because they have a smaller surface area

• stiletto heels boots because they have a smaller surface area

Pneumatic chairs in hairdressing salons depend on the relationship between volume and pressure of a gas to work. When the hairdresser pushes on the lever, the volume of gas in the cylinder decreases. What happens next?

• The gas pressure increases and the chair is released back down.

• The gas pressure decreases and the chair is released back down.

• The gas pressure increases and the chair is pushed up.

• The gas pressure decreases and the chair is pushed up.

When force increases while surface area remains constant...

• pressure increases

• pressure decreases

• pressure stays the same

• pressure increases then decreases

Does this image repreent a compressible fluid or an icompressible fluid?

• Compressible

• Incompressible

In which of the following scenarios will there be more pressure applied on the ice, given that the force remains the same.

• A person kite surfing.

• A toboggan being pulled.

• A person skating

• A person walking.

When area increases while force remains constant...

• pressure increases

• pressure decreases

• pressure stays the same

• pressure increases then decreases

The pressure caused by the weight of the atmosphere is called...

• gravity

• buoyant force

• pressure

• atmospheric pressure

Tags

NGSS.MS-ESS2-6

An object exerts 360 N of force on a surface that has an area of 8.0m². How much pressure does the object exert?

• 5.625 Pa

• 45 Pa

• 70 Pa

• 45 N

A fluid takes the shape of its container and flows freely

• true

• false