Standard Science Primary 6 Interactions

Tim used a spring balance to pull a 1kg block across four different surfaces. On which surface would the spring balance show the HIGHEST reading?

A Plastic tray
B Glass sheet
C Polished wood
D Sandpaper
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Worked Solution

Step 1: The reading on the spring balance represents the force needed to overcome friction. Step 2: Rougher surfaces create more friction. Step 3: Sandpaper is the roughest surface listed, requiring the most force.

Correct answer: Sandpaper

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