A spring has an original length of 10 cm. When a 50g weight is hung on it, the length becomes 12 cm. What will be the length of the spring when a 150g weight is hung on it, assuming it is within its elastic limit?
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Worked Solution
Step 1: Find the extension for 50g. Extension = 12cm - 10cm = 2cm.
Step 2: Calculate extension for 150g. Since 150g is 3 times 50g, the extension is 2cm * 3 = 6cm.
Step 3: Find new length. Original length (10cm) + Extension (6cm) = 16cm.
Correct answer: 16 cm
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