Physics

In a position-time graph, the slope of the graph at any point represents the velocity of the object at that instant. A positive - valued slope indicates motion in the positive direction, and a negative - valued slope indicates motion in the negative direction. Also, if the magnitude of the slope is increasing, the speed of the object is increasing; if the magnitude of the slope is decreasing, the speed of the object is decreasing.

Initially, the graph is curved. The slope of the tangent to the curve is positive and gradually decreasing. Since the slope represents velocity, the velocity of the object is positive and decreasing. This means the object is decelera...