A spring has an original length of 10 cm. When a 100g weight is hung on it, the length becomes 12 cm. What will be the length of the spring if a 200g weight is hung on it (assuming it is within the elastic limit)?
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Worked Solution
Step 1: Calculate the extension for 100g: 12cm - 10cm = 2cm.
Step 2: Since extension is proportional to weight, 200g will cause 2 x 2cm = 4cm extension.
Step 3: Final length = Original length + Extension = 10cm + 4cm = 14cm.
Correct answer: 14 cm
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