If a bag of sugar is placed on a table at room temperature and no external forces are acting on it, the bag will remain stationary. In this case, the bag's velocity (momentum) would be zero, and there would be no uncertainty or direction associated with its movement because it's not moving.
However, if there are external factors or forces acting on the bag, such as a push or a breeze, then the bag may start moving. In that case, the velocity (momentum) of the bag would depend on the magnitude and direction of the external force applied to it.
If the bag is set into motion by an external force, its velocity (momentum) would have both magnitude and direction, making it a vector quantity. The uncertainty in the velocity (momentum) would depend on various factors, including the uncertainty in the initial conditions, the accuracy of the measurement devices used to determine the velocity, and any external factors that could influence the motion of the bag.
Without more specific information about the circumstances and the external forces acting on the bag, it is not possible to determine the exact uncertainty or direction of the moving bag.