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PHYS 163
Lab #7 Projectile Motion
2.5
ANALYSIS
2.0
From Procedure Parts 1 – 3
±
Dy (m)
±
1.473
0.006
1.100
0.003
1.5
R
Dx (m)
1.0
From Procedure Parts 4, 5
High
Low
q (deg)
sin( 2q )
R (m)
±
15
0.5
1.5
0.017
1.5
1.5
25
0.8
2.3
0.003
2.3
2.3
35
0.9
2.6
0.025
2.5
2.6
45
1.0
2.6
0.003
2.6
2.6
v0 (m/s)
±
v0 (H)
3.126
3.107
0.017
v0 (L)
3.092
RESULTS: v0
Using Equation 7.3 combined
with Parts 1 – 3 results
2.6
2.6
% difference of v0 values:
v0 (m/s)
±
Slope
3.430
5.470
0.083
Slope(H)
3.510
Slope(L)
3.360
v0 (H)
5.556
v0 (L)
5.390
-76.054
2.6
2.6
R
Using Eq. 7.6 combined with
graphical results
2.6
2.6
Do values agree?
No
2.6
2.6
0.5
0.0
0.0
2.6
2.6
0.9
0.9
1.0
1.0
sin(2q)
R vs sin(2q) – 1 click
y = 2.9318x + 0.0611
Series1
Linear (Series1)
0.2
0.4
0.6
0.8
1.0
sin(2q)
R vs sin(2q) – 2 clicks
y = 0.5306x + 2.0614
Series1
Linear (Series1)
1.0
sin(2q)
1.0
1.0
1.0
1.0
PHYS 163
Lab #7 Projectile Motion
DATA
Distances should be recorded in meters
Part I. Spring Gun on Table (Procedure Parts 1, 2, 3)
ybt = vertical distance from bottom of ball to tabletop
ytf = vertical distance from tabletop to floor
yfs = vertical distance from floor to shelftop of box
x0 = horizontal distance from tip of gun in unloaded position to front of table
xtb = horizontal distance from front of table to front of box
xi (i = 1, 2, 3) = distance from front of box to “ith” mark
Dy, Dx represent displacements
Distance
±
ybt
32.8
0.1
Distance
±
x0
30.5
0.1
|xi-xavg|
ytf
90.9
0.1
xtb
107.4
0.1
yfs
13.7
0.1
x1
9.4
0.1
0.0
Dy
110.0
0.3
x2
9.1
0.1
0.3
x3
9.7
0.1
0.3
xi,avg
9.4
xi accidental uncert.
Dx
Part II. Spring Gun on Floor (Procedure Parts 4, 5)
x0 = distance from tip of gun in unloaded position to front of box
xi (i = 1, 2, 3) = distance from front of box to “ith” mark
R represents horizontal displacement when Dy = 0
147.3
0.1
0.3
0.5
15o
Distance
±
x0
137.2
0.1
x1
17.3

0.1
x2
15.2
0.1
x3
14.2
0.1
xi,avg
15.6
R
|xi-xi, avg|
25o
Distance
±
x0
212.1
0.1
1.7
x1
18.8
0.1
0.2
0.3
x2
18.3
0.1
0.3
1.4
x3
18.8
0.1
0.2
0.1
xi,avg
18.6
0.1
152.7
1.69
R
230.7
0.34
35o
Distance
±
45o
Distance
±
x0
236.2
0.1
x0
250.2
0.1
x1
17.3
0.1
2.5
x1
9.1
0.1
0.2
x2
20.3
0.1
0.5
x2
9.1
0.1
0.2
x3
21.8
0.1
2.0
x3
8.6
0.1
0.3
xi,avg
19.8
0.1
xi,avg
9.0
0.1
R
256.0
2.5
R
259.2
0.3
|xi-xi, avg|
|xi-xi, avg|
|xi-xi, avg|

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