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Science Friction
STEM Project
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Forces in Action
What is a force?
What happens when you slide on the floor in shoes compared to socks?
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What is Friction?
What is a Force?
A push, pull, twist or turn
Can anyone name a Force?
Gravity, friction, weight
What is Friction?
Friction is a force which occurs when two objects move over each other. It tries to
stop them moving
Draw an example of friction in everyday life – is it good or bad?
Examples of Friction
Friction can be good or bad!
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Why is Friction Important? You experience friction every day
Friction is important to us at Croda
We make chemicals to make plastics more slippery
We make chemicals to help engines work more efficiently
Activity 1Surfaces
Science Friction
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Activity 1 – Surfaces
Let’s test 3 different surfaces to see how well a model car slides down them
Work in groups
First thing to do: Colour in 3 stripes on paper
One stripe of pencil One stripe of crayon One stripe of felt tip
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Activity 1 – Surfaces
Make a prediction before we test!
Make 3 model ‘cars’ by putting play-doh into foil cups
Slide the cars down the stripes on a ramp – which surface works best?
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What Did You Find?
Felt tip
Crayon
Pencil
Activity 2Lubricants
Science Friction
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Can you help us?
Scientists at Croda need to find a new friction modifier
A friction modifier is also called a lubricant
Lubricants help us to reduce friction between two surfaces, such as parts in an engine
Can you help us to find the best lubricant? A, B or C
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Activity 2 – Lubricants
First, let’s make another prediction!
Take the laminated sheet of plastic, pipette on a small amount of A, B and C
Feel them to see which you think will help the car slide fastest & why
Everyone make a note of your individual prediction
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Equipment
This is what your car and ramp will look like:
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Time to slide
Slope height
Car weight
Slope surface
Speed of car
Time to slide
Car weight
How does the type of lubricant affect the speed of the car?
Car type
Which is the best lubricant?
Amount of lubricant
Amount of lubricant
Type of lubricant
Type of lubricant
Slope surface
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Activity 2 – Lubricants
How can we produce a graph of our results?
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What Have We Found?
Which was the best lubricant?
A, B or C?
Why did they perform differently?
