Standard Science Primary 6 Interactions

A car tyre has deep grooves (treads) on its surface. How do these treads help a driver on a rainy day?

A They decrease gravity acting on the car.
B They decrease friction to allow the car to go faster.
C They make the tyre more flexible.
D They increase friction between the tyre and the road by removing water.
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Worked Solution

Step 1: Wet roads have lower friction because water acts as a lubricant. Step [2-9]: Treads allow water to be channeled away. Step [2-9]: This maintains contact between the tyre and road, increasing friction for safety.

Correct answer: They increase friction between the tyre and the road by removing water.

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