Types of Friction

A force that opposes motion between any surfaces that are in contact.

• gravity

• acceleration

• friction

• direction

Which type of friction is shown in the picture?

• rolling

• fluid

• static

• sliding

Sanding wood with sandpaper will ______ the friction.

• increase

• decrease

Which type of friction is shown in the picture?

• fluid

• static

• rolling

• sliding

Tags

NGSS.HS-PS2-1

If the following objects were dropped from the same height, which one would hit the floor first?

• 
• 
• 

Tags

NGSS.MS-PS2-4

Which type of friction is shown in the picture?

• rolling

• static

• fluid

• sliding

Adding oil will ________ friction on gear chains.

• increase

• decrease

Which type of friction is shown in the picture?

• fluid

• static

• rolling

• sliding

Give an example of a time when MORE friction is needed.

Give an example of a time when LESS friction is needed.