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1. | A spring of force constant 800N/m has an extension of 5cm. The work done in extending it from 5cm to 15cm is? | |
A. | 8J | |
B. | 16J | |
C. | 24J | |
D. | 32J | |
Answer: Option A | |
Explanation: | |
At x1 = 5 cm, |
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