Answer:
706.68 N
Explanation:
By Hooke's law,
[tex]F = ke[/tex]
[tex]k=\dfrac{F}{e}[/tex]
Using the values in the question,
[tex]k=\dfrac{265\text{ N}}{0.15 \text{ m}}=1766.7\text{ N/m}[/tex]
When e = 0.4 m,
[tex]F = 1766.7\text{ N/m}\times0.4\text{ m}=706.68\text{ N}[/tex]