A spring is 10 cm long. When a 50g weight is hung on it, the length becomes 12 cm. What will the length of the spring be if a 150g weight is hung on it, assuming it is within the elastic limit?
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Worked Solution
Step 1: Original length = 10 cm.
Step 2: Extension for 50g = 12 - 10 = 2 cm.
Step 3: 150g is three times 50g, so extension = 2 cm x 3 = 6 cm.
Step 4: Total length = 10 + 6 = 16 cm.
Correct answer: 16 cm
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