Advanced Science Primary 6 Interactions

The table shows the length of a spring when different weights are hung on it. What is the original length of the spring?

A 15 cm
B 10 cm
C 20 cm
D 12 cm
Show Worked Solution

Worked Solution

Step 1: Identify the extension rate. For every 10g, the spring extends by 5cm (15cm - 10g, 20cm - 20g). Step 2: Calculate the length with 0g weight. Step 3: 15cm (at 10g) - 5cm (extension for 10g) = 10cm.

Correct answer: 10 cm

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