Correct Consider a spring that does not obey Hooke's law very faithfully. One end of the spring is fixed. To keep the spring stretched or compressed an amount , a force along the x-axis with Part B X-component F_ = kx - br" + cc must be applied to the free end. Here k - 100 N/m. b - 700 N/ma, and c = 12, 000 N/m. Note How much work must be done to compress this spring by 0.050 m from its unstretched length? that a > 0 when the spring is stretched and a