A spring extends by 4 cm when a 20g load is hung on it. What is the total length of the spring if its original length is 10 cm and a 30g load is hung on it?
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Worked Solution
Step 1: Find extension per 10g (4cm / 2 = 2cm).
Step [2-9]: Extension for 30g = 2cm x 3 = 6cm.
Step [2-9]: Total length = 10cm + 6cm = 16cm.
Correct answer: 16 cm
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