Pressure

• Physics
• Secondary Education
• Age 12,13

16 March 2023

3.5 Pressure between solids

Content objectives

• State that pressure is the pushing effect of a force
• Write and use the equation that links pressure, force, and area
• Explain how the unit of pressure can be worked out from the units of force and area

Remember?

Examples of solid

Which nail is easier to hammer into the wood?

A

B

C

D

Which nail is easier to hammer into the wood?

A

B

C

D

Which nail is easier to hammer into the wood?

A

B

C

D

Condition: 

- same amount of Force

WHY A? 

- more pointed

- less surface area

A sharp knife can cut a tomato easier.

A sharp knife can cut a tomato easier.

How could you increase the pushing effect of a force (pressure)?

• Increase (make higher) the FORCE you put
• Decrease (make lower) the SURFACE AREA of the object - more pointed or sharper

Which is the correct equation that links pressure, force, and area?

The formula triangle

Links between pressure, force, and area

Group work

• Work together to complete the given exercise correctly.
• Submit or share your output when done.

Plenary (Sharing)

What's next?

Friday: Pressure calculations