A spring has an original length of 10 cm. When a 50 g mass is hung on it, its length becomes 12 cm. What will its length be when a 150 g mass is hung on it?
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Worked Solution
Step 1: Extension for 50 g = 12 cm - 10 cm = 2 cm.
Step 2: 150 g is 3 times 50 g, so extension = 2 cm x 3 = 6 cm.
Step 3: New length = Original length + Extension = 10 cm + 6 cm = 16 cm.
Correct answer: 16 cm
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