PASCO ME-6800 Projectile Launcher (Short Range) - Manual (Page 25)

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M o d e l N o . M E - 6 8 0 0 E x p . 4 : P r o j e c t i l e P a t h
0 1 2 - 0 5 0 4 3 G 21
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
2
graph tell you about the relationship of y and x
2
?
3. If you plotted a graph of y versus x, how would the graph differ from the y versus x
2
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
A B –
A B +
2
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 
 
------------------- x100