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Slide 1: Tekstslide
NatuurkundeMiddelbare schoolhavo, vwoLeerjaar 2,3

In deze les zitten 14 slides, met interactieve quiz en tekstslides.

time-iconLesduur is: 50 min

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Slide 1 - Tekstslide

You can convert metric units for distance, area and volume
You can use the formula for pressure in different situations

Slide 3 - Tekstslide

Slide 4 - Tekstslide

To sit on a nail is painful...
for obvious reasons.

But when you sit down on 1000 nails,
you hardly feel anything anymore.

This is because the gravitational force is
equally shared over a large surface.

Slide 5 - Tekstslide

Pressure=on a surfaceForce

Slide 6 - Tekstslide

Calculation skills
Watch these videos if you are having trouble with

  • converting units

  • cinvert areas and volumes

  • forgot how to use formula's

Slide 7 - Tekstslide

Pressure example
When you dive a force of a larger surface, it will hurt less because of a smaller pressure. 

In this example you can put a block on side A or B. The surface for side B is 4 times as big as the surface of side A. This means that the experienced pressure for side B will be 4 times less as well.

It helps when you make a little drawing when you need to convert areas from cm2 to m2. It will give you a quick insight by how much you need to multiply or devide to convert the unit.

Slide 8 - Tekstslide

Falling through ice
This often ends fatal..
But there is something you can do.
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Therefore prepare and spread your weight as much as possible when moving over the ice.

Slide 9 - Tekstslide

Example question
Shufling over the ice on your stomach will make a big difference as you will found with this example.

In this question the trick is not to forget that you have two feet instead of one.

5 Steps

Slide 10 - Tekstslide

Pressure in a liquid
The pressure in a liquid is equal everywhere.

Because of the constant relationship between force and surface in the equation, the pressure of the liquid will cause a bigger force near the larger cilinder (B).

Although there is more force on cilinder B, it will travel more slowly

Slide 11 - Tekstslide

Slide 12 - Tekstslide

Assignment: Thumbtack
A force of F = 1,5 N is exerted on the topside of a thumbtack.
The topsurface is A = 0,65 cm2
The surface of the needle is A = 2,1 mm2
To push the thumbtack into a bulletin board you need a pressure of 106 Pascal

a) Calculate if you can push the thumbtack into the board.
b) Calculate the minimal force needed for this

Slide 13 - Tekstslide

The thumbtack

upload your solution

Slide 14 - Open vraag