Pressure and its effects in our daily life

How do you Calculate Pressure

• Force(N)/Area(m²)

• Force(kg)/Area(mi²)

• Area(m²)/Force(N)

What is pressure?

• The amount of force exerted on a surface

• The surface area of an object

• The weight of an object

The SI unit for pressure is:

• Newtons

• Grams

• Pascals

• PSI (Pounds/inch2)

If an object's surface area is smaller does it create more or less pressure?

• More

• Less

• The same

If you're walking in snow why would you wear boots instead of high heels?

• Because boots have a higher surface area making the pressure less and stopping you from sinking.

• Because it's more comfortable

• No, high heels have higher surface area making the pressure more and helps you walk.

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.

Why do you wear studs on grass?

• Because the studs create more pressure allowing it to grip into the grass.

• Stylish

• Creates friction

Watch the tyres of tractor rolling. Rear tyres are broader because

• It looks good.

• Broader tyres lessen the muscular Force required.

• Broader tyres lessen the pressure on ground.

• Broader tyres lessen the friction on 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

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