Science Friction Forces in Action What is a

Science Friction

Forces in Action § What is a force? § What happens when you slide on the floor in shoes compared to socks?

Forces in Action § What is a Force? A push, pull, twist or turn

Forces in Action § What is a Force? A push, pull, twist or turn § Can anyone name a Force? Gravity, friction, weight

What is Friction? § What is a Force? A push, pull, twist or turn § Can anyone name a Force? Gravity, friction, weight § What is Friction? Think about what happens when you slide on the floor in shoes compared to socks

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 can be good or bad!

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

Video – Plastics Additives

Science Friction Activity 1 Surfaces

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

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? § This is what your car and ramp will look like:

What Did You Find? § Felt tip § Crayon § Pencil

Science Friction Activity 2 Lubricants

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

Which is the best lubricant? How does the type of lubricant affect the speed of the car?

Which is the best lubricant? Slope height Amount of lubricant Slope surface Car weight Time to slide Speed of car Type of lubricant Time to slide How does the type of lubricant affect the speed of the car? Car weight Car type Amount of lubricant Slope surface

Activity 2 – Lubricants § Feel them… § Let’s make a prediction of which you think will help the car slide fastest & why § Everyone make a note of your individual prediction § Let’s start the experiment, make some notes and remember to keep your experiment fair!

Activity 2 – Lubricants Science Brought To Life § How can we produce a graph of our results?

What Have We Found? § Which was the best lubricant? A, B or C? § Why did they perform differently?

What Have We Found? § Which was the best lubricant? A, B or C? § Why did they perform differently? Under a microscope: Surface of ‘Car’ Lubricant Surface of ‘Track’

Thank you! We hope you enjoyed our visit! Perhaps one day you would like to be a scientist too? !