When a 20g weight is hung on a spring, its length increases from 10 cm to 13 cm. What will be the total length of the spring if a 40g weight is hung on it instead?
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Worked Solution
Step 1: Calculate the extension for 20g: 13 cm - 10 cm = 3 cm.
Step 2: Calculate the extension for 40g: 3 cm × 2 = 6 cm.
Step 3: Add the extension to the original length: 10 cm + 6 cm = 16 cm.
Correct answer: 16 cm
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