Friction

Friction is the ____________ that one surface exerts on another surface.

• gravity

• motion

• force

What does friction do to the motion of an object?

• Friction slows down or stops an object.

• Friction keeps an object from moving.

• Both of the above

Tags

NGSS.3-PS2-1

What does the strength of the 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

There are _________ types of friction.

• 2

• 1

• 4

• 5

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

• liquid

• oil

• solid

Rolling friction is when an object ___________ over a surface.

• bounces

• rolls

• slides

Fluid friction includes when an object moves through air.

• true

• false

_____________ friction acts on objects that are not moving.

• sliding

• rolling

• static

• fluid

The more friction that there is, the slower an object will move.

• true

• false

Tags

NGSS.3-PS2-1