Do you know how to find a slope of a graph? Most students do. If you don't know, please see the following Figure:

The following diagram may help you to understand how to make graphical analysis. When you calculate the slope, you have to know :
Dx represents t², scale should be converted into squareded seconds, Dy represents height D, scale should be converted into meters, not just their lengths (in cm or so). The graphs must pass through the origin.. This is very important!

The following diagram is a graphical explaination for Experiment 4, Part 2. the tan-colored forces are 200g at 0°, and 150g at 90° respectively.

The following diagram is a graphical explaination for Experiment 4, Part 5.

Will you try to draw the similar diagrams for the rest parts of the experiment?

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