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# During compression of a spring the work done

Question:

During compression of a spring the work done is $10 \mathrm{~kJ}$ and $2 \mathrm{~kJ}$ escaped to the surroundings as heat. The change in internal energy, $\Delta \mathrm{U}($ inkJ) is:

1. 8

2. 12

3. $-12$

4. $-8$

Correct Option: 1

Solution: