\( [5 \mathrm{marks}] \)
QLFSTION?
FICARRE2.2
FIGURE \( 2.2 \) shoms one cnd of a horizontal spring \( \left(k=80.0 \mathrm{~N} \mathrm{~m}^{-1}\right) \) is hek fiued while an exlcmul force is. appliod to the froe end, stretching it slowly from \( x-0 \) to \( x=400 \mathrm{~cm} \).
(a) Calsulate the work done by the applied force on the spring.
(b) Calculane the additional week done in stretching the spring firom \( x=4.004 \mathrm{~cm} \) to \( x=700 \mathrm{~cm} \).
\( [5 \) marks \( ] \)
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