A stone is shown at rest on the ground. A. The vector shows the weight of the stone. Complete the vector diagram showing another vector that results in zero net force on the stone. B. What is the conventional name of the vector you have drawn?
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A. To complete the vector diagram showing another vector that results in zero net force on the stone, you need to draw a vector equal in magnitude but opposite in direction to the weight vector. This vector is often called the "normal force."
The weight vector points downward due to the force of gravity. To cancel out this downward force and achieve zero net force, the normal force vector should point upward with the same magnitude as the weight vector.
Therefore, you would draw a vector pointing upward from the stone with the same length as the weight vector, creating a diagram where the weight vector and the normal force vector are equal and opposite.
B. The conventional name of the vector you have drawn is the "normal force." The normal force is a reaction force exerted by a surface to support the weight of an object resting on it. It is called the "normal force" because it is perpendicular (or "normal") to the surface at the point of contact. In this case, since the stone is at rest on the ground, the ground is exerting an upward normal force to balance the downward weight force of the stone.