Newton's Laws introduce two new ideas, the ideas of force and inertia or mass. Forces are how we interact with or influence other objects. Intuitively, forces are pushes or pulls on objects.
Forces are vectors, they have a magnitude and a direction in space.
If you push something, you push it in a certain direction. Like other vectors we represent forces by arrows with the length representing the magnitude and the direction of the arrow representing the direction of the force. If two or more forces act on an object the net or total force is the vector sum of the individual forces. If the two forces were in the same direction, i.e. both toward the right, the net force would be 50N to the right. If it is moving with a speed in a certain direction, it will continue to maintain its speed in the same direction if no net external force acts on it.