HOTS Science Primary 6 Interactions

Why do mountain bike tyres have deep treads compared to racing bike tyres used on smooth tracks?

A To increase the mass of the bike.
B To decrease air resistance.
C To increase friction for better grip on uneven ground.
D To make the bike more elastic.
Show Worked Solution

Worked Solution

Step 1: Identify the terrain (mountainous/uneven). Step [2-9]: Deep treads create more surface interaction and "bite" into the soil. Step [2-9]: This increases the frictional force (grip), preventing the bike from slipping.

Correct answer: To increase friction for better grip on uneven ground.

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