7.1 Pressure [Must do]

How do you Calculate Pressure

• Force(N)/Area(m²)

• Force(kg)/Area(mi²)

• Area(m²)/Force(N)

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

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

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

• f ÷ a
• f x p
• p x f
• f ÷ p

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

• f ÷ a
• f x p
• p x a
• f ÷ p

Pressure can be measured in Pascales (Pa) or Newtons per square metre.
1 Pa = 1 N/m²

• True
• False

What does pressure measure?

• Strength
• Force exerted on a given area of surface

What is the equation used to calculate pressure?

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

Pressure decreases when the surface area over which a force is applied increases

• True
• False

Why won't you sink in mud if you wear boots?

• Because the surface area is larger creating less pressure.

• Has air in it to keep you floating.

• Because the mud won't want you.