What is friction?
Explore what friction is.
The rules of friction
Explore how friction works.
Which materials grip best?
Learn how different materials grip.
Where a good grip is needed
Discover why a good grip is sometimes very important.
Getting moving
Explore how friction affects how things move.
Reducing friction
Explore how friction may be reduced.
Where slipperiness occurs
Discover why things slip.
Rolling friction
Explore friction in rolling objects.
Water resistance
Explore water resistance.
Air resistance
Explore air resistance.
Answers
Teacher's Guide.
