![]() And finally, if a line crosses over the x-axis from the positive region to the negative region of the graph (or vice versa), then the object has changed directions. And one knows that an object is moving in the negative direction if the line is located in the negative region of the graph (whether it is sloping up or sloping down). So one knows an object is moving in the positive direction if the line is located in the positive region of the graph (whether it is sloping up or sloping down). As learned in Lesson 1, a positive velocity means the object is moving in the positive direction and a negative velocity means the object is moving in the negative direction. The distance travelled by a moving body in a given time can. In a speed time graph the acceleration is given by slope of the graph. The value of acceleration from speed time graph of moving body can be calculated as: a Change in speed or velocity / Time taken. In uniform motion, the straight line is shown on the distance-time graph 7. Speed time graph for a uniformly changing speed will be a straight line. Similarly, the velocity would be negative whenever the line lies in the negative region (below the x-axis) of the graph. Uniform and Non-uniform Motion: Differnece 7. Since the graph is a velocity-time graph, the velocity would be positive whenever the line lies in the positive region (above the x-axis) of the graph. The answers to these questions hinge on one's ability to read a graph. Interpreting change in speed from velocity-time graph. Interpreting direction of motion from velocity-time graph. ![]() Interpreting direction of motion from position-time graph. Introduction to one-dimensional motion with calculus. Positive Velocity versus Negative Velocity Describe the motion of an object in terms of distance or displacement, speed or. Lesson 2: Straight-line motion: connecting position, velocity, and acceleration. But how can one tell whether the object is moving in the positive direction (i.e., positive velocity) or in the negative direction (i.e., negative velocity)? And how can one tell if the object is speeding up or slowing down? Describe the slope of the graph of velocity against time V(m/s) a. The slope of a velocity-time graph reveals information about an object's acceleration. Objective To analyze and interpret the given graph of velocity against time and distance against time. This very principle can be extended to any conceivable motion. If the acceleration is negative, then the slope is negative (i.e., a downward sloping line). If the acceleration is positive, then the slope is positive (i.e., an upward sloping line). However, other information can be obtained from such a graph. The first graph you plotted is called a velocity-time graph. ![]() Explain how the shape of your second graph correlates with your first graph. Explain any change in the slope of the line of the graph. If the acceleration is zero, then the slope is zero (i.e., a horizontal line). Write a brief explanation of the meaning of the graph. The principle is that the slope of the line on a velocity-time graph reveals useful information about the acceleration of the object. time graphs for these two basic types of motion - constant velocity motion and accelerated motion (i.e., changing velocity) - reveal an important principle.
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