Ravi suspended an iron nail using a spring. He then placed a strong magnet directly below the nail without touching it. What happened to the extension of the spring?
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Worked Solution
Step 1: The iron nail is a magnetic material.
Step 2: The magnet below exerts a magnetic force of attraction, pulling the nail downwards.
Step 3: This additional downward force increases the total stretching force on the spring.
Step 4: Therefore, the extension increases.
Correct answer: It increased.
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