Final answer:
To lift a load of 300 N, a force equal to or greater than 300 N must be exerted in the opposite direction of gravity.
Step-by-step explanation:
To determine the effect needed to lift a load of 300 N, we need to consider the concept of force. Force is defined as the product of mass and acceleration. In this case, we have the mass of the load, which is not given, so we can't determine the acceleration directly. However, the velocity of the embassy and its efficiency are not relevant to finding the necessary force to lift the load.
To lift the load, the embassy would need to exert a force equal to or greater than 300 N in the opposite direction of gravity. This can be achieved by applying a force upward, either directly or through the use of a pulley system or other mechanisms.