A spring is 20 cm long. When a 100g weight is hung on it, its length becomes 23 cm. What will be the total length of the spring if a 300g weight is hung on it?
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Worked Solution
Step 1: Calculate extension for 100g: 23 cm - 20 cm = 3 cm.
Step [2-9]: Calculate extension for 300g: 3 cm x 3 = 9 cm.
Step [2-9]: Calculate total length: 20 cm (original) + 9 cm (extension) = 29 cm.
Correct answer: 29 cm
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