heview |COnstaI 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 æ, a force along the x-axis with X-component F, = kæ – bæ² + cæ³ must be applied to the free end. Here k = 100 N/m, b = 700 N/m², and c = 12, 000 N/m³. Note Part A How much work must be done to stretch this spring by 0.050 m from its unstretched length? that x > 0 when the spring is stretched and a < 0 when it is compressed. Express your answer in joules. W = J Submit Request Answer Part B How much work must be done to compress this spring by 0.050 m from its unstretched length? Express your answer in joules. W = J

heview |COnstaI 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 æ, a force along the x-axis with X-component F, = kæ – bæ² + cæ³ must be applied to the free end. Here k = 100 N/m, b = 700 N/m², and c = 12, 000 N/m³. Note Part A How much work must be done to stretch this spring by 0.050 m from its unstretched length? that x > 0 when the spring is stretched and a < 0 when it is compressed. Express your answer in joules. W = J Submit Request Answer Part B How much work must be done to compress this spring by 0.050 m from its unstretched length? Express your answer in joules. W = J