User's Manual

Model No. ME-6830 Exp. 4: Projectile Path

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7. Calculate the percent difference between the two initial speeds that were found using the different methods.

Record the percent difference in Table 4.2. (To calculate the percent difference, let A be one of the initial

speed values and let B be the other initial speed value.)

Data Table 4.2

Question

1. From the graph, was the best-fit line straight?

2. What does the shape of the best-fit line on the y versus x

graph tell you about the relationship of y and x

3. If you plotted a graph of y versus x, how would the graph differ from the y versus x

graph?

4. What shape is the path of the projectile?

Table 4.2: Compare Methods for Initial Speed

Item Value

Slope of graph

Initial speed from slope

Time of flight

Initial speed from x,y

Percent difference

AB–

AB+

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x100