You are to watch this video,

**Part II: Increasing Length**.

**Physics Lab Demo: Exploring Hooke’s Law Springs**, and fill in the following data chart. In the lab these students are performing you need to record the total length of the spring and the force required to maintain that length. So the spring's length will be your independent variable and required force will be your dependent variable.

You will now use EXCEL to graph both data tables. Start by opening a new EXCEL file and save it in the thaw space as **LastnameLastnameHookesLaw.xls**

In

**Part I** you should plot weight on the x-axis (independent variable) since we arbitrarily decided on the amount of mass to suspend from the spring, and plot total length on the y-axis (dependent variable) since the spring's final length (original length + stretch) depended on the amount of suspended mass. Please use the following cell designations. Be CAREFUL of the switch in units!

- A1 Mass
- B1 Weight
- C1 Total Length

After entering your data, highlight the numerical data in columns 2 and 3 and graph as a scatter plot. Right click on a data point and add a trend line. Display the line's equation and correlation coefficient (R

^{2}). Title this graph as

**Length vs Force**.

In

**Part II** you should plot total length on the x-axis (independent variable) since the students in the video arbitarily decided to increase the length of the spring in 2-cm increments, and plot applied force on the y-axis (dependent variable) since the amount of force to stretch the spring dependent of the amount of displacement. Once again, be CAREFUL of the switch in units!

- A20 Total Length
- B20 Applied Force

After entering your data from the video, highlight your numerical data in columns 1 and 2 and graph as a new scatter plot. Right click on a data point and add a trend line. Display the line's equation and correlation coefficient (R

^{2}). Title this graph as

**Force vs Length**.

After you resave your file with all of the information from your data tables and graphs, go back and rescale any axes to insure that you maximize the display of that graph's data. Before closing EXCEL, print your data tables and graphs. Please use print-preview to make sure that all of information (data tables and graphs) fit on only one page.