The graph below shows the extension of a spring when different weights are hung on it. <br><br>What is the extension of the spring when a weight of 30g is hung on it?
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Worked Solution
Step 1: Look at the graph to find the relationship between weight and extension.
Step [2-9]: At 10g, extension is 3cm. At 20g, extension is 6cm.
Step [2-9]: The extension increases by 3cm for every 10g added. For 30g, the extension is 3cm x 3 = 9cm.
Final Answer: 9 cm.
Correct answer: 9 cm
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