Help plz anyone ?

Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity

=force × distance a. work b. velocity c. pressure d. momentum

Two steel balls, each of mass m, are welded to a light rod of length l and negligible mass and are initially at rest on a smooth horizontal surface. a horizontal force of magnitude f is suddenly applied to the rod as shown. determine (a) the instantaneous acceleration a of the mass center g and (b) the corresponding rate at which the angular velocity of the assembly about g is changing with time.