Types of Friction

Which of the following material lowers friction when we pushed between metal plates

• Oil

• air

• fine marble powder

• water

If we make the sliding surfaces smooth by lubricating etc. the friction can be

• increased

• dangerous

• reduced

• all of the above

Which type of friction is shown in the picture?

• fluid

• static

• rolling

• sliding

Which type of friction is shown in the picture?

• rolling

• static

• fluid

• sliding

What does the strength of the frictional force depend on? Check the answers that apply.

• The types of surfaces

• The weather

• How hard the surfaces push together

• motion

A hard wood floor has more friction than a carpet.

• true

• false

_____________ friction acts on objects that are not moving.

• sliding

• rolling

• static

• fluid

Sliding friction is when two _____________ surfaces slide over one another.

• liquid

• oil

• solid

Static friction prevents you from slipping when you walk on a sidewalk.

• True

• False

Types of friction include

• static friction.

• sliding friction.

• rolling friction

• all of the above