![]() ![]() Do you get the same measurement values regardless of who releases the ball, measures the time, or records the result? Discuss possible causes of discrepancies, if any. Repeat Steps 4 through 6, with different people taking on the roles of experimenter, timer, and recorder.Use your measurements of time and the displacement to make a position vs.Repeat Step 4, stopping the times at the distances of 1.0 m, 1.5 m, 2.0 m, 2.5 m, and 3.0 m from the bottom of the ramp.Have a third person, the recorder, record the time in a data table. Have a second person, the timer, begin timing the trial once the ball reaches the bottom of the ramp and stop the timing once the ball reaches 0.5 m. Have the experimenter release the ball.If the ball does not reach the 3.0 m mark, then increase the incline of the ramp by adding another book. This person will release the ball from the top of the ramp. Have one person take the role of the experimenter.Unlike a distance-time graph, it includes both the positive and negative y-axis. Mark distances of 0.5 m, 1.0 m, 1.5 m, 2.0 m, 2.5 m, and 3.0 m from the bottom of the ramp. To show the change in position over time, we can use a position-time graph.Adjust location, as necessary, until there is no obstacle along the straight line path from the bottom of the ramp until at least the next 3 m. Build a ramp by placing one end of the board on top of the stack of books.In terms of a physical situation in the real world, these quantities will take on a specific significance, as we will see below. The letter b is the y-intercept which is the point at which the line crosses the vertical, y-axis. ![]() Here m is the slope, defined as the rise divided by the run (as seen in the figure) of the straight line. As in Figure 2.11, a straight-line graph has the general form y = m x + b y = m x + b. A car traveling at 10 m/s is traveling at twice the velocity 10 s later. Using the graph, what is the runner’s velocity from 4 to 10 s 3 m/s 0 m/s 1.2 m/s 3 m/s 2.4 Velocity vs. time Velocity Displacement Distance Acceleration 35. In algebra, you would have referred to the horizontal axis as the x-axis and the vertical axis as the y-axis. What is the slope of a straight line graph of position vs. When two physical quantities are plotted against each other, the horizontal axis is usually considered the independent variable, and the vertical axis is the dependent variable. Graphs in this text have perpendicular axes, one horizontal and the other vertical. In this section, we will investigate kinematics by analyzing graphs of position over time. Graphs not only contain numerical information, they also reveal relationships between physical quantities. A graph, like a picture, is worth a thousand words.
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