Her friend should push the box in the direction of East, where it will begin to move faster as the magnitude of force increases.
Force is defined as the push or pulls on an object with mass that causes it to change its velocity. Force is an external agent capable of changing the state of rest or motion of a particular body. It has a magnitude and a direction.
In Physics, the magnitude of force refers to the sum of all the forces that are acting on an object. If all the forces are acting in the same direction, then the magnitude of the force increases. If the forces are acting on an object in different directions, then the magnitude of the force decreases.