Starter • Name all the forces you can think of;

Forces

Learning Objectives

You will be able to state the effects of friction

You will be able to Describe different factors that affect friction

You will be able to suggest ways to reduce friction.

Keywords

FrictionLubricationDrag force

Streamlined

What is friction? Think pair share!

Write a few examples

There is resistance to the rubbing motion. The name of this resistant force is FRICTION

Friction can;Produce heat Peter

Wear things away Watts

Slow things down Spent

Make a noise Money

Rub your hands together for a minute. How does that feel?

What causes the heat?

Friction always tries to slow moving objects down. It opposes motion.

It is a force between 2 touching objects.

Learning Objectives

You will be able to state the effects of friction

You will be able to describe factors that affect friction

You will be able to suggest ways to reduce friction.

Keywords

FrictionLubricationDrag force

Streamlined

Investigating Friction

• You can use newton meters to investigate the effect of friction.

Equipment around the room • Newton meter• 6 x 100 g masses• wooden blocks• different surfacesSafety• Do not overload the springs on newton meters.

Investigating friction

The type of graph you plot will depend on the variables you used.• When would you plot a bar chart?• When would you plot a line graph?

How does the roughness of the surface affect friction?

Learning Objectives

You will be able to state the effects of friction

You will be able to describe factors that affect friction

You will be able to suggest ways to reduce friction.

Keywords

FrictionLubricationDrag force

Streamlined

What helps to reduce friction?

• Adding o-- and g-----, this is called lubrication.

• Can you think of where this would be used?

Learning Objectives

You will be able to state the effects of friction

You will be able to describe factors that affect friction

You will be able to suggest ways to reduce friction.

Keywords

FrictionLubricationDrag force

Streamlined

Multiple choice Game

• Using the cards tell me what you think … ready …. Set ….. Okay lets go

A unit of force is:

A Newton

B Metre

C Gram

D Kilogram

Which example shows unhelpful friction?

A Friction between the tyre and the road.

B Friction between the paper and the point of the pen.

C Friction in the wheel axles of the bicycle.

D Friction between your shoes and the floor.

Which of the following about friction is incorrect

A Friction slows down a ball rolling in grass.

B Friction wears away tyres.

C Friction can speed up a falling object.

D Friction makes objects hotter.

Which of these produce friction when they rub together

A A rough surface and a smooth one.

B 2 smooth surfaces.

C 2 rough surfaces.

D 2 smooth surfaces with oil between them.

Whic of the following is not an example of a lubricant?

A Grease for bicycle chains.

B Rubber on car tyres.

C Water on swimming pool tiles.

D Oil in car engines.

A force is a

A A spring.

B A movement.

C An engine.

D A push or a pull.

Friction is

A A non contact Force.

B A magnetic force.

C A contact force.

D Uses static electricity.

What is the frictional force that slows something down through the air?

A Streamlining

B Gravity

C Thrust

D Air resistance

Learning Objectives

You will be able to state the effects of friction

You will be able to Describe different factors that affect friction

You will be able to suggest ways to reduce friction.

Keywords

FrictionLubricationDrag force

Streamlined