Standard Science Primary 6 Interactions

Which of the following is a way to reduce friction between two moving surfaces?

A Adding a layer of lubricant like oil
B Removing wheels and using flat bases
C Making the surfaces rougher
D Increasing the mass of the moving object
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Worked Solution

Step 1: Friction occurs when surfaces rub against each other. Step [2-9]: Lubricants like oil or grease create a smooth layer between surfaces, preventing them from catching and thus reducing friction.

Correct answer: Adding a layer of lubricant like oil

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