Standard Science Primary 6 Interactions

Siti applied some grease to the moving parts of her bicycle. How does this help her ride the bicycle more easily?

A Grease acts as a lubricant to reduce friction.
B Grease increases the hardness of the metal parts.
C Grease increases the weight of the bicycle.
D Grease increases the friction between the parts.
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Worked Solution

Step 1: Identify that grease is a lubricant. Step [2-9]: Lubricants create a smooth layer between moving surfaces. Step [2-9]: This reduces frictional force, making it easier for the parts to move against each other.

Correct answer: Grease acts as a lubricant to reduce friction.

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