An elastic spring has an original length of 12 cm. When a 200g load is hung on it, its length becomes 16 cm. What is the extension of the spring when a 500g load is hung on it?
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Worked Solution
Step 1: Extension for 200g = 16cm - 12cm = 4cm.
Step [2-9]: Extension for 100g = 4cm ÷ 2 = 2cm.
Step [2-9]: Extension for 500g = 2cm × 5 = 10cm.
Correct answer: 10 cm
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