Standard Science Primary 6 Interactions

Which of the following is a way to reduce friction between moving machine parts?

A Increasing the weight of the parts
B Applying grease or oil
C Adding more surface area in contact
D Using sandpaper
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Worked Solution

Step 1: Friction occurs when surfaces rub. Step [2-9]: Lubricants like grease or oil create a smooth layer between surfaces. Step [2-9]: This prevents direct contact and reduces frictional force.

Correct answer: Applying grease or oil

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