Work done by conservative and non conservative forces. Here we are concerned with the work done on a particle as it is moved from point a to point b $.$ energy differences are given as $$U$=$Ub$$Ua $,$KE$=$KEb$$KEa and $$ME$=$MEb$$MEa where U denotes potential KE kinetic and ME total mechanicl energies. What can you say about work done by conservative forces Wcons $?$ a$)$ Wcons$=+$U b$)$ Wcons$=$U c$)$ Wcons$=0$ d$)$ Wcons$=$ME e$)$ Wcons$=$ME