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?
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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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