Pressure 1

​Watch this video (4 mins)

​Make sure to understand:

• ​Definition of Pressure

• Formula of Pressure​

• Unit of Pressure

Multiple Choice

What is pressure?

• The amount of force exerted on a surface

• The surface area of an object

• The weight of an object

Multiple Choice

What is the equation used to calculate pressure?

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

Multiple Choice

Pressure is measured in what units

• Newtons
• m/s
• Pascals
• Moles

​Watch this video (3 mins)

​Make sure to understand:

• How to calculate pressure.

• ​How surface area can affect pressure.

Multiple Choice

The pressure resulting from a force of 50 N exerted over an area of 5 m² is

• 10 N
• 0.1 N
• 10 N/m²

• 0.1 Pa

Multiple Choice

What pressure will be exerted by a 10 N box that has equal sides of 2 m?

• 5 Pa

• 2.5 Pa

• 1.25 Pa

• 0.2 Pa

• 0.4 Pa

​Watch this video (4 mins)

​Make sure to understand:

• Why the bed of nails trick is actually safe.

Open Ended

In your own words, explain why it's safer to stand on many nails than standing on one nail.

Multiple Choice

Which of the statements is true?

• The bottom of the boot exerts more pressure than the shoe as a result of an increase in surface area.
• The bottom of the shoe exerts more pressure than the boot as a result of an decrease in surface area.
• The bottom of the shoe exerts the same pressure as the bottom of the boot.

​Watch this video (3 mins)

​Make sure to understand:

• Why wide tyres are better for soft terrain.

Multiple Choice

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

Multiple Choice

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

Poll

Do you prefer this style of lesson?

• Yes

• No

• Not sure