Chapter 3 Review - Forces and Fluids

Which is not a fluid?

• helium

• ice

• milk

• water

Ice floats in water. Based on what you know of density, which statement must be true?

• a water molecule has more mass than an ice molecule

• a water molecule has less mass than an ice molecule

• a volume of ice has less mass than the same volume of water

• a volume of ice has more mass than the same volume of water

Which principle explains how the buoyant force of an object changes with the weight of the fluid it displaces?

• Archimedes principle

• Bernoulli’s principle

• Pascal’s principle

• Newton’s principle

If you poured the fluids below into a container, which would sink to the bottom?

• water with a density of 1.0 g/cm3

• vegetable oil with a density of 0.91 g/cm3

• honey with a density of 1.36 g/cm3

• air with a density of 0.00013 g/cm3

The figure shows a side view of a mountain that extends below the water’s surface. At which point would the pressure be the greatest?

• point A

• point B

• point C

• point D

The figure shows an aquarium filled with water. Four cubes made from different materials are placed in the aquarium. For which object is the weight of the object and the buoyant force acting on it not equal?

• A

• B

• C

• D

When an input force is applied above point A, which is true of the change in fluid pressure at points A, B and C?

• the fluid pressure increases the most at point A

• the fluid pressure increases the most at point B

• the fluid pressure increases the most at point C

• the fluid pressure remains constant at all three points

Ahmad kicks a soccer ball so that it spins in the air and curves around an opposing player. Which principal is applied in this situation?

• Archimedes Principle

• Bernoulli’s Principle

• Pascal’s Principle

• Newton’s Principle

Which statement about boats is correct?

• A boat cannot be made from metal because metal has a greater density than water.

• A boat floats if its overall density is less than that of water.

• A boat floats only if its overall mass per volume is greater than water’s mass per volume.

• A boat floats only if it’s weight is greater than the buoyant force acting on it

Why are drag forces greater in water than in air?

• Air is denser than water.

• Air is a fluid, but water is not.

• Water is denser than air.

• Water is a fluid, but air is not.