1. If you purchase milk from several different stores, how would you calculate the "Mean" price?
   
   
2. What physical property does the slope of a velocity-time graph represent?
   
   
3. Define force. What are the units of force?
   
   
4. Define acceleration. What are the units of acceleration?

1. Find and record the total mass of the Cart and the Fan Accessory. When you mass them, make sure that you have no more than 4 total batteries/slugs.
2. Place 1 battery and 3 slugs into the fan accessory.
3. While there is no tension in the string, press the Tare or Zero button on the Force Sensor.
4. Turn the Fan Accessory on. Be careful not to touch the fan blades.
   
   
5. Press the Start button in DataStudio. Collect at least 10 seconds of data.
   
   
6. Press the Stop button in DataStudio.
7. Use the cursor to highlight the appropriate data from your Force graph. DataStudio will automatically calculate the "Mean" value of your highlighted data. Enter the mean value into the data table in DataStudio.
8. Go to the Experiment Menu and select "Delete All Data Runs."
9. Unhook the string from the Force Sensor.
10. Turn the Fan Accessory on. Be careful not to touch the fan blades.
    
11. Press the Start button in DataStudio. Catch the Cart before it hits the motion sensor.
    
    
12. Press the Stop button in DataStudio.
13. Use the cursor to highlight the appropriate data from your Velocity graph. DataStudio will automatically calculate the slope of your highlighted data. Enter the slope value into the acceleration column of the data table in DataStudio.
14. Repeat steps 3-13. Remove one slug and replace it with a battery. You should have now have 2 slugs and 2 batteries.
15. Repeat steps 3-13. Remove one slug and replace it with a battery. You should have now have 1 slug and 3 batteries.
16. Repeat steps 3-13. Remove the last slug and replace it with a battery. You should have now have 4 batteries.
    
    

Cart and Fan Accessory Mass:
	Force	Acceleration
1 Battery 3 Slugs
2 Batteries 2 Slugs
3 Batteries 1 Slug
4 Batteries 0 Slugs

1. After you have entered your four data sets into the Force v. Acceleration Data Table in DataStudio, maximize the Force v. Acceleration graph (bottom-left of screen). Observe the slope. What are the units of the slope?
   
   
2. Write an equation that describes the relationship between Force and Acceleration. Start with y=mx+b. Make sure to use the appropriate variables and units.

1. What is the relationship between Force and Acceleration?
   
   
2. What physical property does the slope represent?
   
   
3. How does your value for the slope compare to the actual value recorded at the beginning of the lab? Find the percent difference.
   
   
4. What physical property does the vertical intercept represent?
   
   
5. In your linear equation, would you expect the vertical intercept to equal zero? Explain.
   
   
6. Draw a force diagram of the Cart when the fan is on. What can be said about the sum of the forces on the Cart? What can be said of the motion of the Cart?
   
   
7. Draw a force diagram of the Cart when the fan is on and the Cart is attached to the force sensor with the string. What can be said about the sum of the forces on the Cart? What can be said of the motion of the Cart?