Consider a spring that does not obey Hook's law. One end of the spring is held fixed. When it is stretched or compressed by an amount x, the force it exert is `F=ax-bx+cx^(2)` Where `a=50N//m b=150N//m^(2)` and `c=5000N//m^(3)` How much work must be done to stretch this spring by 1m from its unstretched length ?

Answer

A