When a 100g weight is hung on a spring, its length increases from 10cm to 12cm. What will be the length of the spring if a 200g weight is hung on it (assuming it is within its elastic limit)?
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Worked Solution
Step 1: Original length = 10cm. Extension for 100g = 12cm - 10cm = 2cm.
Step 2: Extension is proportional to the weight. For 200g, extension = 2cm x 2 = 4cm.
Step 3: New length = Original length + new extension = 10cm + 4cm = 14cm.
Correct answer: 14cm
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