1. Briefly describe the motion in the four sections of the 1st graph:
For the first two seconds, stand 1.5 meters away from the sensor. Next, move 1 meter closer to the motion detector over the next four seconds. During the next two seconds, move two meters away from the sensor. Finally, stay 2.5 meters away from the sensor for two seconds.
2. What is the velocity in the second section of the first graph (the 1st slanted section)? Show work.
The person stand about 0.5 meters away from the sensor for two seconds then begins to increase speed over the next 6 seconds until the person is 3.5 meters away.
4. What difficulty would you encounter in finding the slope of this graph? what does this tell you about the motion?
The slope is different at every point of the graph because it is showing exponential growth. This tells you that the person was accelerating during the course of the motion.
5. In the third graph, after you begin to move, how long will it take you to return to the starting spot?
It takes four seconds from the moment that you begin to move to return to the starting point.
6. In terms of your motion, what changes at time = 3 seconds on the graph?
At 3 seconds, the direction of motion is reversed and you begin to move back towards the sensor.
7. In the fourth graph, what is different about the two diagonal sections of the graph?
The two diagonal sections have different slopes, which means that the person had different speeds during those stretches of the graph.
8. What is happening for the third section of the graph (horizontal line)?
The person is staying at a constant distance of 2.0 meters away from the sensor for 2 seconds.
How close should you be to the motion sensor at the beginning?
You should be 1.5 meters away from the sensor.
What change in distance should you walk during the frist section of movement?
You should walk 1 meter closer to the sensor during the first section of movement.
How long should your motion last during this first section of movement?
The first section of motion should last 4 seconds.
Questions:
1. Briefly describe the motion in the four sections of the 1st graph:
For the first two seconds, stand 1.5 meters away from the sensor. Next, move 1 meter closer to the motion detector over the next four seconds. During the next two seconds, move two meters away from the sensor. Finally, stay 2.5 meters away from the sensor for two seconds.
2. What is the velocity in the second section of the first graph (the 1st slanted section)? Show work.
V = (delta)X / (delta)T = ( .5m - 1.5m)/(2sec-6sec) = .25 meters/second
The velocity of the section is .25 meters/second.
3. Describe the motion in the second graph.
The person stand about 0.5 meters away from the sensor for two seconds then begins to increase speed over the next 6 seconds until the person is 3.5 meters away.
4. What difficulty would you encounter in finding the slope of this graph? what does this tell you about the motion?
The slope is different at every point of the graph because it is showing exponential growth. This tells you that the person was accelerating during the course of the motion.
5. In the third graph, after you begin to move, how long will it take you to return to the starting spot?
It takes four seconds from the moment that you begin to move to return to the starting point.
6. In terms of your motion, what changes at time = 3 seconds on the graph?
At 3 seconds, the direction of motion is reversed and you begin to move back towards the sensor.
7. In the fourth graph, what is different about the two diagonal sections of the graph?
The two diagonal sections have different slopes, which means that the person had different speeds during those stretches of the graph.
8. What is happening for the third section of the graph (horizontal line)?
The person is staying at a constant distance of 2.0 meters away from the sensor for 2 seconds.
How close should you be to the motion sensor at the beginning?
You should be 1.5 meters away from the sensor.
What change in distance should you walk during the frist section of movement?
You should walk 1 meter closer to the sensor during the first section of movement.
How long should your motion last during this first section of movement?
The first section of motion should last 4 seconds.
EXCELLENT.........15/15!