解答上述试题---**Question 2** **Question Stem:** 在图 1.3-16 中，以 A 为作用点画出沿斜面滚动的小球所受重力的示意图。 (In Figure 1.3-16, draw a schematic diagram of the gravitational force acting on the small ball rolling along the inclined plane, with A as the point of application.) **Other Relevant Text:** 图 1.3-16 (Figure 1.3-16) **Chart/Diagram Description:** * **Type:** Geometric figure representing a physical setup. * **Main Elements:** * A right-angled triangle is drawn, representing an inclined plane and a vertical wall. One vertex is at the bottom-left, forming a right angle. The hypotenuse represents the inclined surface, and the vertical side represents a wall. * A circle is positioned in the corner formed by the inclined plane and the vertical wall. The circle is tangent to both the inclined surface and the vertical wall. * Inside the circle, there is a small dot labeled "A". This point A is located near the center of the circle. * **Relative Position:** The circle (representing a small ball) is resting in the wedge formed by the inclined plane and the vertical surface, touching both. Point A is within the ball.