The graph shows the extension of a spring when different weights are added. What is the original length of the spring if its total length with a 20N weight is 15 cm and its extension for 20N is 5 cm?
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Worked Solution
Step 1: Total length = Original length + Extension.
Step [2-9]: 15 cm = Original length + 5 cm.
Step [2-9]: Original length = 15 cm - 5 cm = 10 cm.
Correct answer: 10 cm
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