Capstone: SHM and the Motion Sensor:

Click on Hardware Setup in the upper left-hand corner. If the interface is on, but still the software cannot see it, you will need to reboot the machine:

capstone screenshot

The simplest way to attach the motion sensor is to click on the first Digital input and to select, in the resultant dropdown, Motion Sensor II. To zero measurents at equilibrium (where the stationary mass, supsended from the spring, should be no closer to the sensor than, say, 35 cm) select properties and, in the resulting dialogue, click on Zero Sensor Now:

capstone screenshot
capstone screenshot

Now, click again on Hardware Setup to suppress it from view. To set up a graph, click on the Graph icon in the upper right-hand corner in the Displays panel.

capstone screenshot

To display several quantities simultaneously on a common time scale (e.g., position, velocity and acceleration), you'll need to click on the Add new plot area icon in the graph toolbar. Click on each of th Select Measurement buttons to specify the quantities you wish to visulize (i.e., position, velocity and acceleration on the vertical axes; and time along the horizontal):

capstone screenshot

To test the setup, release the mass at some small distance from its equilibrium position, and click on the Record button on the bottom left of the window:

capstone screenshot

In order to raise the precision of measurements in the software, select the Data Summary dialogue along the left margin of the application window and, in the resulting dialogue, specify the number of decimal places in each of the relevant quantities:

capstone screenshot
capstone screenshot

In order to read the coordinates of data points from the graph, select the plot area of interest and click on the Coordinates Tool button along the graph toolbar:

capstone screenshot


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