A spring is 10 cm long. When a 100g load is hung on it, its length becomes 13 cm. What will its length be if another 100g load is added? (Assume the spring is within its elastic limit).
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Worked Solution
Step 1: Find the extension for 100g: 13 cm - 10 cm = 3 cm.
Step [2-9]: Total weight is now 200g, so total extension is 3 cm x 2 = 6 cm.
Step [2-9]: New length = original length + total extension = 10 cm + 6 cm = 16 cm.
Correct answer: 16 cm
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