Q6. A steel wire of length \( 2.6 \, \text{m} \) and cross-sectional area \( 2 \times 10^{-6} \, \text{m}^2 \) is stretched by \( 0.52 \, \text{mm} \). If the Young's modulus of steel is \( 2 \times 10^{11} \, \text{N/m}^2 \), what is the force applied?
- A. \( 70 \, \text{N} \)
- B. \( 90 \, \text{N} \)
- C. \( 60 \, \text{N} \)
- D. \( 80 \, \text{N} \)