Chapter 2, Lesson 2 Friction & Gravity

How many types of friction are there?

• 2

• 3

• 4

• 5

This picture demonstrates _____________________ friction.

This picture demonstrates which type of friction?

• sliding friction

• rolling friction

• fluid friction

• static friction

Which type of friction involves a solid object moving through a liquid or a gas?

• sliding friction

• rolling friction

• fluid friction

• static friction

This picture represents __________________ friction.

Friction will always involve at least ______ surfaces interacting.

• one

• two

• three

• four

Rolling friction only involves objects that have wheels.

• TRUE

• FALSE

This image represents which type of friction?

• sliding friction

• rolling friction

• fluid friction

• static friction

Friction depends on the types of surfaces involved and how hard the surfaces are __________________ together.

Two ways you can change the amount of friction an object has is by changing the types of _____________ and by how hard the objects are __________________ together.

• surfaces

• forces

• pushed

• separated