Standard Science Primary 6 Interactions

Ravi wants to move a heavy cabinet across the floor. He finds it difficult to push. Which of the following methods would NOT help him reduce the frictional force between the cabinet and the floor?

A Adding rollers under the cabinet.
B Applying wax to the bottom of the cabinet.
C Using a rougher floor mat under the cabinet.
D Using a trolley with wheels.
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Worked Solution

Step 1: Friction depends on the roughness of the surfaces in contact. Step [2-9]: Adding rollers, wax, or wheels reduces friction. Step [2-9]: A rougher mat increases the surface roughness, thereby increasing frictional force.

Correct answer: Using a rougher floor mat under the cabinet.

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