Pressure

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

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

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

Telephone wires sag on a hot day because..

• Particles move faster when heated
• The particles expand when heated
• The particles melt and the wires droop down
• The particles move further apart when heated

Which of the following is NOT a property of liquids?

• definite volume

• can pour

• can diffuse into another liquid

• definite shape

The amount of force pushing on an area is the definition of....

• Fluid

• Viscosity

• Barometer

• Pressure

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

Where is pressure the greatest on the dam?

• D

• C

• B

• A

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

• f ÷ a

• f x p

• p x f

• f ÷ p