If two balanced forces act on an object in opposite directions then that object will remain stationary.
If an object is at equilibrium, then the forces are balanced.
Two forces at an equilibrium on an object in opposite directions will keep the object stationary.
Two forces at an equilibrium on an object in opposite directions will keep the object what?
  energy
  yanked
  mechanical
  moving
  stationary
  It will move.
  kinetic energy
  pulled