A spring has an original length of 10 cm. When a 50g weight is hung on it, the length becomes 12 cm. What will the total length be if another 50g weight is added?
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Worked Solution
Step 1: Calculate the extension caused by the first 50g weight: 12 cm - 10 cm = 2 cm.
Step 2: Within the elastic limit, extension is proportional to the force (weight).
Step 3: Adding another 50g weight adds another 2 cm of extension.
Step 4: Total length = Original length + Total extension = 10 cm + 2 cm + 2 cm = 14 cm.
Correct answer: 14 cm
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