A spring was 10cm long. When a 100g weight was hung on it, it became 12cm long. What will be the length of the spring if a 200g weight is hung on it? (Assume the spring is within its elastic limit)
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Worked Solution
Step 1: Initial length = 10cm. Extension with 100g = 12 - 10 = 2cm.
Step 2: Since extension is proportional to weight, 200g (double the weight) will cause double the extension (2cm x 2 = 4cm).
Step 3: New length = Initial length + Extension = 10cm + 4cm = 14cm.
Correct answer: 14cm
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