A spring has an original length of 10 cm. When a 50 g weight is hung on it, the total length becomes 12 cm. What will the total length be if a 100 g weight is hung on it?
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Worked Solution
Step 1: Calculate the extension for 50g: 12cm - 10cm = 2cm.
Step 2: Extension is proportional to mass. 100g is double 50g, so extension doubles: 2cm x 2 = 4cm.
Step 3: Add extension to original length: 10cm + 4cm = 14cm.
Correct answer: 14 cm
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