A  particle is displaced from (1m,1m,1m) to (2m,2m,2m)  under a force  F→=(2xyi^+x2j^)N The work done by this force is

Work done=∫F→.dr →   here F=force=iFx+jFy+kFz; dr=displacement=idx+jdy+kdz  W  =   ∫(Fxdx+Fydy+F2dz) W=∫(1,1,1)(2,2,2)(2xyi^+x2j^).(dxi^+dyj^+dzk^) W=   ∫(1,1,1)(2,2,2)2xy dx +x2 dy    W=22 x2y(1,1,1)(2,2,2)=[22.2-12.1] Work done=8−1=7J