Friction

Which of these best describes friction?

• A rubbing force.

• Something that is slippery.

• Gravity.

• Movement across a smooth surface.

What does friction produce?

• light
• sound
• heat
• gravity

How does friction affect speed?

• more friction decreases speed
• more friction increases speed
• less friction decreases speed

Rougher surfaces have ...

• greater friction
• less friction
• the same level of friction

Which would create more friction?

• carpet

• metal

The rougher the surface, the faster an object will travel over the surface.

• True
• False

There are four types of friction. What are those four called?

• sliding, rolling, static, and fluid

• slipping, sliding, falling, and fluid

• slipping, sliding, static, and flowing

What type of friction will slow down the rolling soccer ball?

• Fluid

• Sliding

• Rolling

• Static

What kind of friction will slow down a kid that goes down the slide?

• Static

• Rolling

• Fluid

• Sliding

What kind of friction slows down the movement of the swimmer?

• Fluid

• Static

• Sliding

• Rolling