The air rushes out of the balloon and through the cap, lifting the CD up on a cushion of air. The air reduces the friction...

Enrichment Activity 5-11 11-14

The pencil lifts the jar. As you push it in, the pencil forces the grains sideways, but they fall back into the gap as you try...

Enrichment Activity 5-11 11-14

Friction is the force that acts against the motion of two surfaces in contact. The friction between the just two pages is tiny...

Enrichment Activity 5-11 11-14

The water flows along the string. The friction between the string and the water slows down the flow, pulling the water to the...

Enrichment Activity 5-11 11-14

You can remove the note safely. Friction between the bottle and note makes the note pull the bottle with it, but you...

Enrichment Activity 5-11 11-14