Performance task #1
COffee filter lab
Procedure:
1. 5 flat-bottomed coffee filters and a motion sensor were gathered.
2. 5 coffee filters, stacked together, were thrown from a height of 1.6 m on to the motion
sensor. Observations were recorded.
3. One coffee filter was removed and the stack was thrown from a height of 1.6 m on the
motion sensor and observations were recorded.
4. Step 3 was repeated until only one coffee filter remained.
5. All the equipment was returned.
1. 5 flat-bottomed coffee filters and a motion sensor were gathered.
2. 5 coffee filters, stacked together, were thrown from a height of 1.6 m on to the motion
sensor. Observations were recorded.
3. One coffee filter was removed and the stack was thrown from a height of 1.6 m on the
motion sensor and observations were recorded.
4. Step 3 was repeated until only one coffee filter remained.
5. All the equipment was returned.
Motion Sensor Device Analysis
The following data was compiled from the motion sensor device.
The following data was compiled from the motion sensor device.
Graphs from Motion Sensor Device
The following graphs were compiled from the data obtained from the motion sensor device.
The following graphs were compiled from the data obtained from the motion sensor device.
Tracker Analysis
The following data was compiled from tracker.
The following data was compiled from tracker.
![Picture](/uploads/2/6/7/6/26767820/9987008.png?699)
1 Coffee Filter
![Picture](/uploads/2/6/7/6/26767820/6236786.png?662)
2 Coffee Filters
![Picture](/uploads/2/6/7/6/26767820/5199946.png?664)
3 Coffee Filters
![Picture](/uploads/2/6/7/6/26767820/4176078.png?666)
4 Coffee Filters
![Picture](/uploads/2/6/7/6/26767820/9273410.png?672)
5 Coffee Filters
Graphs from Tracker
The following graphs were compiled from the data obtained from tracker.
The following graphs were compiled from the data obtained from tracker.
Analysis of Results
Both methods accurately show that as the number of coffee filters increase, or as mass increases, the terminal velocity increases. We found terminal velocity by analyzing the data and finding that in the beginning of all the drops, the coffee filters were accelerating at a high rate (-9.8m/s2), but near the time of landing, the filters were accelerating at a much lower rate which shows that they were approaching their terminal velocities. Although some of the filters did not reach their terminal velocities, the fact that the acceleration had decreased shows that they were very close to their terminal velocity.
With 1 coffee filter, the terminal velocity was approximately 104.5 cm/s. For 2 coffee filters, it was around 154.5 cm/s. With 3 coffee filters, the terminal velocity was 182.3 cm/s. Four coffee filters approached a terminal velocity of 207.7 cm/s, and five coffee filters approached approximately 232.0 cm/s.
Of the two data collection methods the tracker is more accurate because the data from the motion sensor is less precise and more difficult to analyze. The motion sensor has only a narrow path from where it is able to detect motion. In many trials, the coffee filter shifted a little while in the air, so that the motion sensor would not be able to track it properly. Tracker allows objects to be carefully tracked, as it is done frame by frame.
Both methods accurately show that as the number of coffee filters increase, or as mass increases, the terminal velocity increases. We found terminal velocity by analyzing the data and finding that in the beginning of all the drops, the coffee filters were accelerating at a high rate (-9.8m/s2), but near the time of landing, the filters were accelerating at a much lower rate which shows that they were approaching their terminal velocities. Although some of the filters did not reach their terminal velocities, the fact that the acceleration had decreased shows that they were very close to their terminal velocity.
With 1 coffee filter, the terminal velocity was approximately 104.5 cm/s. For 2 coffee filters, it was around 154.5 cm/s. With 3 coffee filters, the terminal velocity was 182.3 cm/s. Four coffee filters approached a terminal velocity of 207.7 cm/s, and five coffee filters approached approximately 232.0 cm/s.
Of the two data collection methods the tracker is more accurate because the data from the motion sensor is less precise and more difficult to analyze. The motion sensor has only a narrow path from where it is able to detect motion. In many trials, the coffee filter shifted a little while in the air, so that the motion sensor would not be able to track it properly. Tracker allows objects to be carefully tracked, as it is done frame by frame.