Forces in Fluids

What is the SI unit for pressure?

• Pascal (Pa)
• Newton (N)
• Kilogram (Kg)
• Meter (m)

Pressure is 

• force * area
• force / area
• force + area
• force - area

At higher elevations (higher up the mountain), there is _____ air pressure.

• the same
• greater
• less
• equal

As a diver moves deeper in the water, fluid pressure is

• the same
• greater
• less
• equal

Objects in water feel lighter because of the

• air pressure
• buoyant force
• air resistance
• temperature

An object sinks in a bucket of water. The object's density is 

• greater than the density of sand
• less than the water's density
• the same as the water's density
• greater than the water's density

A force on a confined fluid changes the pressure all through the fluid. This is

• Pascal's principle
• Archimedes' principle
• Bernoulli's principle
• Newton's principle

A hydraulic system uses fluid to

• increase air pressure
• cause acceleration
• decrease air pressure
• multiply force

As the speed of a moving fluid increases, the fluid pressure 

• is equal
• decreases
• stays the same
• increases

What force pushes up on an airplane wing as it moves through the air?

• gravity
• mass
• lift
• air resistance