Friction

Friction is a force that...

• acts when 2 surfaces rub together

• pulls everything down

• needs to change shape

Friction can start and_______ things from moving

• stop

• forcemeter

Which surface will produce more friction?

• rough

• smooth

Slippery surfaces has a little friction

• true

• false

• I don´t know

Friction...

• Doesn't make things stop

• Makes things stop

• Makes things faster

How does friction affect speed?

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

On which surface will a toy car travel the furthest?

• Carpet
• Polished Wood
• Ice

If you kick a ball, what stops the ball?

• the grass

• sand

• your foot

• friction

Rougher surfaces have ...

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

Friction is a force created by-----

• pushing

• rubbing

• gravity