1. Starter Sketch a distance vs. time graph of a person walking away from the origin, and then back toward the origin. Graphing Motion with the Motion Detector SN

2. Practice Making Position vs. Time Plots - Connect the motion Detector to the interface. - Log in, and start up the Logger Pro software. - Go to the file open icon, and open the file: Physics by Vernier > 01a graphing motion Practice making position vs. time plots for a person walking at a steady speed in a straight line, moving towards and away from the detector. Note that the the detector will not read correctly read objects closer than 50 cm. You may want to carry a flat piece of card board to present the detector with a uniform target surface if your plots are erratic looking. Practice making the following plots: 1. Standing still about 2m away from the detector. 2. Walking steadily towards the detector at a slow speed. 3. Walking steadily towards the detector at a fast speed. 4. Walking steadily away from the detector at a slow speed. 5. Walking steadily away from the detector at a fast speed. Making Position vs. Time Plots - Connect the motion Detector to the interface. - Log in, and start up the Logger Pro software. - Go to the file open icon, and open the file: Physics by Vernier > 01a graphing motion Practice making position vs. time plots for a person walking at a steady speed in a straight line, moving towards and away from the detector. Note that the the detector will not read correctly read objects closer than 50 cm. You may want to carry a flat piece of card board to present the detector with a uniform target surface if your plots are erratic looking. Practice making the following plots: 1. Standing still about 2m away from the detector. 2. Walking steadily towards the detector at a slow speed. 3. Walking steadily towards the detector at a fast speed. 4. Walking steadily away from the detector at a slow speed. 5. Walking steadily away from the detector at a fast speed. SN

3. Questions Question 1: What is the characteristic of the plot that tells you if the speed is slow or fast? Question 2: What is the characteristic of the plot that tells you if the person is walking towards or away from the detector? Question 3: What is the characteristic of the plot that tells you if the person is walking at a steady ( or constant) speed? SN

4. Application Sketch your distance vs. time graphs in your science notebook. Don’t forget to label the axes and title each graph. If time allows, try the graph matching in files 01b – 01g. Sketch your distance vs. time graphs in your science notebook. Don’t forget to label the axes and title each graph. If time allows, try the graph matching in files 01b – 01g. Connection How could you use a motion detector in a practical, real-life situation? Exit Summarize how a motion detector works. SN