Standard Science Primary 6 Interactions

A car is driving on a dry road. When it starts to rain, the driver finds it harder to stop the car quickly. Which of the following explains this?

A The water acts as a lubricant, decreasing friction.
B Gravitational force increases.
C The mass of the car increases significantly.
D Magnetic force opposes the brakes.
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Worked Solution

Step 1: Braking relies on friction between tyres and the road. Step [2-9]: Water creates a layer between the surfaces, acting as a lubricant. Step [2-9]: Reduced friction means the car requires a longer distance to stop.

Correct answer: The water acts as a lubricant, decreasing friction.

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