A heavy$-$duty shock absorber is compressed $2$ cm from its equilibrium position by a mass of $500$ kg$.$ How much work is required to compress the shock absorber $8$ cm from its equilibrium position? $($Amass of $500$ kg exerts a forcs in newtons$)$ of $500$g$,$ where gr $9\mathrm{.}8$ m$/$s$^2)$ Set up the integral that should be used to find the work required to compress the shock absorber & om from is equilibrium position. Use decreasing limits of integration. Express al displacements in meters.