Chandra hung different weights on a spring and measured its total length. The results are shown in the table below. What is the original length of the spring?
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Worked Solution
Step 1: Calculate the extension per 20g of weight. 12cm - 11cm = 1cm for 20g.
Step [2-9]: For a 20g weight, length is 11cm. Subtract the 1cm extension to find the original length.
Step [2-9]: 11cm - 1cm = 10cm.
Correct answer: 10 cm
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