A spring has an original length of 15 cm. When a 100g mass is hung on it, its total length becomes 18 cm. What will its total length be if an additional 200g mass is added to it?
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Worked Solution
Step 1: Extension for 100g = 18cm - 15cm = 3cm.
Step 2: Total mass is now 100g + 200g = 300g.
Step 3: Extension for 300g = 3cm x 3 = 9cm.
Step 4: Total length = Original length + Extension = 15cm + 9cm = 24cm.
Correct answer: 24 cm
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