Physical Science: Unit 8 - Forces in Fluids

What is produced by a force exerted over a specific area?

• Pressure

• Speed

• Acceleration

• Density

Which of these units describe pressure?

• Pa

• N/m²

• N/cm²

• All of the above

As the area over which force is exerted decreases, pressure _________________.

• Increases

• Decreases

• Stays the same

Force/Area is the formula for:

• Density

• Velocity

• Pressure

• Acceleration

60 N of force is exerted over an area of 10 cm². What is the pressure exerted on the object?

• 600 N/cm²

• 6 N/cm²

• 60 N/cm²

• 70 N/cm²

A pressure of 10 Pa is produced when a certain force is exerted on an object with an area of 4 m². What is the force on the object?

• 40 N

• 2.5 N

• 14 N

• 0.4 N

Which is an example of a fluid?

• Air

• Water

• Wood

• Both Air and Water

How are fluids able to exert pressure?

• Fluids only exert pressure when they move downward

• All the particles cancel out each other's forces, meaning there is no pressure

• All the forces exerted by individual particles combine to make total pressure

• Fluids only exert pressure when they move upward

Why don't we get crushed by air pressure?

• The fluids in our body exert pressure outward to balance the air pressure acting on us

• Air pressure acts only in the upward direction

• Air pressure acts only in the downward direction

• There is no air pressure on the surface of the Earth

You are in a hot air balloon that is rising higher and higher in the sky. As your elevation increases, the air pressure surrounding you __________________.

• Increases

• Decreases

• Stays the same