Fluids

The upward force exerted by a fluid is called the...

• buoyancy force

• density force

• fluidity force

• normal force

What does viscosity mean?

• How close the particles are together.

• The amount of matter in a substance.

• How easily a fluid flows.

• How dense a fluid is.

Which principle do airplanes take advantage of to fly?

• Archimedes' Principle

• Bernoulli's Principle

• Pascal's Principle

Archimedes' Principle states that... 

• The buoyant force acting on an object equals the volume of the fluid displaced by the object. 
• The buoyant force acting on an object equals the weight (force of gravity) of the fluid displaced by the object.
• The buoyant force acting on an object will always be equal. 

The rule that states that a stream of fast-moving fluid exerts less pressure than the surrounding fluid.

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

An upward force.

• lift
• gravity
• life
• drag

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Which direction does buoyant force always push?

• downward
• upward
• all directions
• sponge bob

Fluid pressure is directed

• in all directions.
• only upward.
• only downward.
• always sideways.

Fluids flow

• only when warmed up.
• from regions of low pressure to regions of high pressure.
• until evenly spread out.
• from high to low pressure.

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An object is buoyed up (floats) when

• the buoyant force is less than the object's weight.

• the buoyant force is greater than the object's weight.

• the buoyant force equals the object's weight.

• there is high air pressure.