Standard Science Primary 6 Interactions

Ravi is pushing a heavy box across a carpeted floor. He finds it difficult to move the box. Which of the following changes would make it EASIER for him to push the box?

A Placing a piece of smooth plastic under the box.
B Adding more items into the box.
C Sprinkling some sand on the carpet.
D Using a rougher carpet.
Show Worked Solution

Worked Solution

Step 1: To make it easier to push, Ravi needs to reduce the frictional force. Step [2-9]: Friction depends on the roughness of the surfaces in contact. Step [2-9]: Smooth plastic is less rough than a carpet, reducing the friction between the box and the floor.

Correct answer: Placing a piece of smooth plastic under the box.

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