A spring obeys Hooke's law. It requires \( 20 \mathrm{~J} \) of work to stretch it through \( 0....

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A spring obeys Hooke's law. It requires \( 20 \mathrm{~J} \) of work to stretch it through \( 0.1 \mathrm{~m} \). Find the force constant of the spring. Also calculate the work done to stretch it further through \( 0.1 \mathrm{~m} \).
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