Forces in Fluids

Materials that can flow and take the shape of their containers include…

• Both gases & liquids

• Liquids

• Gases

• Neither gases nor liquid

In which direction is fluid pressure directed?

• Up

• Down

• Sideways

• In all directions

An object weighing 30 N displaces a volume of water with a weight 20 N. What will the object do?

• It will sink

• It will float

• It will fly

• None of these answers

A helium-filled balloon will float in air because…

• There is more air than helium

• Helium is less dense than air

• Helium is as dense as air

• Helium is more dense than air

If an object weighing 75 N displaces a volume of water with a weight 40 N, what is the buoyant force on the object?

• 35N

• 40N

• 75N

• 115N

Fluid pressure increases as depth increases.

• True

• False

Fluids flow from areas of high pressure to areas of low pressure.

• True

• False

What is the SI unit for pressure?

• calorie 
• pascal
• meter
• pound

The rule that when force is applied to a confined fluid, the increase in pressure is transmitted equally throughout.

• pascal's principle
• bernoulli's principle
• archimedes' principle
• Newton's Law

A system that multiplies force by transmitting pressure from a small surface area through a confined fluid to a larger surface area.

• hydraulic system
• archimedes system
• pressure system
• bernoulli effect