Unit 1 and 2 Recap yr 9

In what direction(s) does air exert pressure?

• everywhere
• no where
• there is no pressure
• downward

What pressure does a 4000N horse exert on the ground if each foot is 10cm²?

• 40 N/cm²
• 100 N/cm²
• 400 N/cm²
• 10 N/cm²

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

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

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

What is the equation used to calculate density?

• density=volume/mass
• density=force/area
• density=mass/volume
• density=force/volume

Pressure is measured in what units

• Newtons
• m/s
• Pascals
• Moles

Pressure is equal to force divided by what

• area
• mass
• time
• distance

If the horse reared up on 2 legs what effect would it have on the pressure?

• it will exert half the pressure it did before
• it will exert the same pressure it did before
• it will exert twice the pressure it did before
• it will exert four times the pressure it did before

Where is pressure the greatest on the dam?

• D
• C
• B
• A