Oh no! YouTube - Man Falls Through Roof 4 times! YouTube - Dumb Woman Falls Through Ice

Spread the force over a greater area

Camels

Snow shoes

Caterpillar tracks

House foundations

I had a dream

Sharp?

Drawing pins

Pressure N Pressure = Force Area N/m2 or Pa m2

Can you copy this please? Pressure F N Pressure = Force Area P A x Can you copy this please? N/m2 or Pa m2

An example A woman has a weight of 500N and one of her shoes has an area of 150 cm2. A man of weight 700 N has a shoe area of 360 cm2 (one shoe). What is the pressure beneath their feet?

An example Mrs Rayner has a weight of 500N and one of her shoes has an area of 150 cm2. Mr Rayner has a weight of 700 N has a shoe area of 360 cm2 (one shoe). What is the pressure beneath their feet? Mrs Rayner’s pressure = Force/area = 500/(2 x 150) = 1.67 N/cm2 Man’s pressure = Force/area = 700/(2 x 360) = 0.97 N/cm2

Calculating your own pressure Remember your weight in Newtons is equal to your mass in kilograms multiplied by 10.

Calculating your own pressure Remember your weight in Newtons is equal to your mass in kilograms multiplied by 10. 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

Pressure under a car

Really nice car

Pressure under a car Mass = 2000kg Weight = mg = 2000x10 = 20000N Area = 2 x 100mm x 150 mm + 100mm 250 mm Pressure = ?

Let’s try some questions!