Standard Science Primary 6 Interactions

A spring is 12 cm long. When a 50g mass is hung on it, its length becomes 15 cm. What is the extension of the spring when a 100g mass is hung on it?

A 18 cm
B 3 cm
C 6 cm
D 21 cm
Show Worked Solution

Worked Solution

Step 1: Extension for 50g = 15cm - 12cm = 3cm. Step [2-9]: Since 100g is double 50g, the extension is double. Step [2-9]: 3cm x 2 = 6cm.

Correct answer: 6 cm

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