Foundation Science Primary 6 Interactions

Which of the following is a way to REDUCE frictional force between two surfaces in contact?

A Increasing the mass of the object
B Applying a layer of oil
C Pressing the surfaces closer together
D Using a rougher surface
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Worked Solution

Step 1: Frictional force opposes motion between surfaces. Step [2-9]: Lubricants like oil fill the gaps in surfaces, making them smoother. Step [2-9]: This reduces the friction between the surfaces.

Correct answer: Applying a layer of oil

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