Part 1: Weight the IOLab device

1. To weigh the IOLab device I am going to simply pick up the device by the force sensor and hold it for a couple of seconds. This data is labeled as “Weigh the IOLab device” in the IOLab repository.
2. From the graph, find and record the weight of the IOLab device.

Part 2: The Relationship Between Force and Acceleration

1. To see the relationship between force and acceleration, we are going to use the force and accelerometer sensors.
2. We will pick up the IOLab device by the force sensor and move it up and down along the IOLab’s y-axis. So we will only need to look at the y component of the accelerometer sensor. This data is labeled as “Force and Accelerometer” in the IOLab repository. Describe your observations of the two graphs. What do these graphs tell you about the relationship between F and a? 
3. Now we will use the parametric plot mode in the software to plot the force versus the acceleration. I will highlight the portion of the graph where the IOLab device was moving up and down. You can see in the figure below that the result is linear in nature. Use this graph to calculate the IOLab’s mass.

Part 3: Friction

1. For this part, we are going to do four trials. In each trial we will place the IOLab device on a surface and pull it by the force sensor hook. In Trial 1, we will place 1 kg of mass on top of the IOLab device and pull it on a desk top. Trial 2 will repeat Trial 1 but with 2 kg on the device instead of 1 kg. These two trials are labeled as ” Desk 1 kg” and “Desk 2 kg” in the IOLab repository.

2. Trials 3 and 4 will repeat the first two trials but we will pull the device on a couch cushion instead of the desk top. These two trials are labeled as “Couch 1 kg” and “Couch 2 kg”.

Part 4: Tension in a String

1. I have tied a piece of string to the force sensor on the IOLab device and used it to hold the device up in the air. Predict what the tension in the string will be (at the point marked with the red dot in the figure below). This data is labeled “Tension in a String” in the IOLab repository. What is the tension in the string?

2. Now we will place tie the string to a second IOLab device and place them on a pulley like in the figure below. Predict what the tension in the strings will be (at the points marked with the red dots). I will use my finger in place of a pulley. Use the data collected by the force sensors to measure the tensions in the string. This data is labeled “Tension 1 Pulley”.

3. Predict what the tensions in the string will be (at the points marked with the red dots) in the figure below. I will again use my fingers as pulleys. Use the data collected by the force sensors to measure the tensions in the string. This data is labeled “Tension 2 Pulleys”.