A spring stretches by 4 cm when a 20g load is hung on it. If the load is increased to 60g, what is the total extension of the spring?
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Worked Solution
Step 1: 60g is 3 times the original 20g load.
Step [2-9]: Total extension = 4 cm x 3 = 12 cm.
Correct answer: 12 cm
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