Force and pressure

Force and pressure

Multiple Choice

An object will ______ if its' density is greater than the density of the fluid it is in. 

• Expand
• Shrink
• Float
• Sink

Multiple Choice

When a diver dives deeper into the ocean, he will experience ...................... liquid pressure

• greater

• less

• no

Multiple Choice

Air pressure is greatest when near Earth's surface because?

• The air molecules are farther apart.
• The air molecules are closer together.
• Air molecules collide.
• Air molecules are tightly packed.

Multiple Choice

As you climb up a mountain what happens to the air pressure?

• decreases

• increases

• stays the same

Multiple Choice

In what direction(s) does air exert pressure?

• everywhere

• no where

• there is no pressure

• downward

Multiple Choice

Where would you find the largest pressure?

• At the bottom of the ocean
• At the top of Mt Everest
• Close to ground on the Scotch oval
• In a rockpool on the Great Barrier Reef

Multiple Choice

Pressure rxerted by air on the earth's surface

• Pressure

• Atmospheric pressure

• Heat pressure

Multiple Choice

What is true about the volume of displaced fluid for an object that is completely submerged?

• The volume of displaced fluid is equal to the object’s volume.

• The volume of displaced fluid is less than the object’s volume.

• The volume of displaced fluid is greater than the object’s volume.

• The volume of displaced fluid is not related to the object’s volume.

Multiple Choice

An object will _______ if the weight of it is equal to the weight of the water in which it is in. 

• Float
• Sink
• Expand
• Shrink

Multiple Choice

Archimedes' principle states that the weight of the fluid an object displaces is equal to the buoyant force acting on the object. 

• True
• False

Multiple Choice

A buoyant force is a(n) ______ force 

• Upward
• Downward
• Side ways

Multiple Choice

A person wearing steel toe capped boots and a person wearing stilleto heels stand on a wooden floor. They both have the same weight. Which person exerts a greater pressure on the floor?

• The person wearing the boots because the boots have a larger surface area in contact with the floor

• The person with the stiletto heels because they have a larger surface area in contact with the floor

• The person wearing the boots because the boots have a smaller surface area in contact with the floor

• The person with the stiletto heels because they have a smaller surface area in contact with the floor

Multiple Choice

Look at the pressure triangle. How do we calculate the area?

• f ÷ a

• f x p

• p x f

• f ÷ p

Multiple Choice

Which of these animals would probably cause the greatest pressure on the ground?

• A fat cow with big feet
• A fat cow with small feet
•  A calf with big feet
• A calf with small feet

Multiple Choice

Army tank tracks are useful for travelling through the mud because..

• they decrease the force the vehicle exerts on the ground

• they increase the force the vehicle exerts on the ground

• they decrease the pressure the vehicle exerts on the ground

• they increase the pressure the vehicle exerts on the ground

Multiple Choice

Which of the statements is true?

• The bottom of the boot exerts more pressure than the shoe as a result of an increase in surface area.

• The bottom of the shoe exerts more pressure than the boot as a result of an decrease in surface area.

• The bottom of the shoe exerts the same pressure as the bottom of the boot.

Multiple Choice

What is the unit of measurement for pressure?

• pascal
• grams
• milliters
• meters

Multiple Choice

Fluids can also include__ and__. 

• solids and liquids
• solids and gases
• liquids and gases
• liquids

Multiple Choice

What is the equation used to calculate pressure?

• pressure= force/mass
• pressure =mass/volume
• pressure=area/force
• pressure=force/area