Do now!Can you stick the summary

and target sheets in please?

Oh no!

http://wm-od.cdn.turner.com/cnn/big/bestoftv/2007/04/06/roberts.the.shot.cnn.ws.wmv

Spread the force over a greater area

Camels

Snow shoes

Caterpillar tracks

House foundations

I had a dream

Death?

Sharp?

Drawing pins

Pressure

Pressure = Force

AreaN/m2 or Pa

N

m2

Pressure

Pressure = Force

AreaN/m2 or Pa

N

m2

F

AP x

Can you copy this please?

An example

A woman of weight 600N and one of her shoes has an area of 150 cm2 A man of mass 750 N has a shoe area of 360 cm2 (one shoe). What is the pressure beneath their feet?

An example

A woman of weight 600N and one of her shoes has an area of 150 cm2 A man of mass 750 N has a shoe area of 360 cm2 (one shoe). What is the pressure beneath their feet?

Angelina pressure = force/area = 600/(2 x 150) = 2 Pa

Brad pressure = force/area = 750/(2 x 360) = 1.05 Pa

Calculating your own pressure

Calculating your own pressureCan you do the

calculations carefully and neatly on the

graph paper to show your pressure (don’t forget you have two feet!) and stick it in

your book

Homework

• You are going to design a poster either

1.Warning about global warming and its consequences

Or

2. Saying that global warming is not happening and that it is a myth

Your poster has to include at least 3 facts, and be eye-catching

Due Wednesday 25th March

Pressure under a car

Pressure under a car

• Mass = 2000kg

• Weight = mg = 2000x10 = 20000N

• Area = ?

• Pressure = ?

Let’s try some questions!

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