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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


Spread the force over a greater area

Spread the force over a greater area


Camels

Camels


Snow shoes

Snow shoes


Caterpillar tracks

Caterpillar tracks


House foundations

House foundations


I had a dream

I had a dream


Death

Death?


Sharp

Sharp?


Drawing pins

Drawing pins


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 pressure

Calculating your own pressure


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 car

Pressure under a car


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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