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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?.

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Do now
Do now!

Can you stick the summary and target sheets in please?


Oh no
Oh no!

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











Pressure
Pressure

N

Pressure = Force

Area

N/m2 or Pa

m2


Pressure1
Pressure

F

N

Pressure = Force

Area

P

A

x

Can you copy this please?

N/m2 or Pa

m2


An example
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 example1
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 pressure1
Calculating your own pressure

Can 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
Homework

  • You are going to design a poster either

  • 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 car1
Pressure under a car

  • Mass = 2000kg

  • Weight = mg = 2000x10 = 20000N

  • Area = ?

  • Pressure = ?


Let s try some questions
Let’s try some questions!

Pages 154 and 155


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