Year 10 Pressure

What is the pressure equation?

• Pressure = Force x Area

• Pressure = Force ÷ Area

• Pressure = Area ÷ Force

• Pressure = Area² ÷ Force

Which property do gasses have that liquid do not?

• Gasses can be compressed

• Gasses can flow

• Gasses can gain energy

• Gasses can change shape

If a piston has a face of 2cm² and a force of 5N is applied what is the total pressure?

• 2.5N/cm²

• 0.4N/cm²

• 10N/cm²

• 10N/m²

If a pressure of 100N/m² is applied to a piston with an area of 1.5m² what is the total force?

• 150N

• 75m²

• 0.015N

• 50N

In the image which hole will allow the water to travel furthest?

• A

• B

• C

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

Why is it dangerous to hold your breathe when SCUBA diving?

• Air in your lungs can expand as you descend, damaging them

• Air in your lungs can expand as you ascend, damaging them

• Water pressure can force water into your lungs

• Your lungs stretch as you go deeper due to increasing pressure

Pressure is measured in what units

• Newtons
• m/s
• Pascals
• Moles

Why do hydraulic mechanisms work with liquids?

• Liquids apply pressure in all directions equally

• Liquids can be compressed

• Liquids increase pressure with depth

• Liquids have a fixed shape

What is the meaning of 'pressure'?

• Force per total area

• Mass per unit area

• Force per unit area