In this experiment, students use the Xplorer GLX to determine the value of an unknown mass.

• Microsoft Word version of this lab:
  
  • momentumGLX_docs.zip (560 KB)

• Xplorer GLX (PS-2002)
• PASPORT Motion Sensor (PS-2103A) (2)
• PAStrack (ME-6960)
• Ohaus Triple Beam Balance (SE-8707)
• Small Resealable Sandwich Bag of Sand
• Rubber Band

1. Find the mass of each cart. Enter the values into Data Table 1 below.
2. Obtain a bag of sand from the instructor. Using a rubber band, attach the bag of sand to the top of one of the carts.
3. Place the two carts on the track.
4. Press the start/stop button to begin collecting data.


5. Collide the two carts.
6. Press the start/stop button to stop data collection.
7. Press to select the Smart Tool.  Press F1 to autoscale if necessary.
   

   

8. Use the left or right arrow buttons to find the velocity of one of the carts just before and just after the collision. See the picture above.
9. Enter the values of the initial and final velocities in Data Table 2.
   

   

10. Press then the number “7” to create a new graph. Select “vel2” as in the picture above.

    

11. Use the left and right arrow buttons in conjunction with the Smart Tool to find the velocity of this cart just before and just after the collision.
12. Enter the values of the initial and final velocities in Data Table 2.

    

13. Press and “Graph 1” to return to the original graph.
14. Repeat the previous steps for a total of 10 collisions varying the velocities and masses of the carts.

• Using the data, find the mass of the bag of sand.