I WONDER - Why Is Friction Useful?

The video explains the concept of friction, highlighting its importance in helping us stand and walk. It contrasts walking on solid ground with walking on ice, where reduced friction makes it difficult to maintain balance.

What is the primary role of friction in our daily movement?

• To keep us standing upright

• To reduce energy consumption

• To make surfaces more slippery

• To increase our speed

Why is it difficult to walk on ice compared to other surfaces?

• Ice is colder than other surfaces

• Ice is smoother and has less friction

• Ice is more reflective

• Ice is heavier

What happens when there is less friction between your foot and the surface?

• You walk faster

• You are more likely to fall

• You jump higher

• You stand still

How does the friction between your foot and ice compare to that with hard ground?

• Friction does not affect walking

• Friction is the same on both surfaces

• There is more friction on ice

• There is less friction on ice

Which surface provides more friction for walking?

• Ice

• Water

• Sand

• Hard ground