lab exercise 3
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School
Thomas Edison State College *
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Course
115
Subject
Aerospace Engineering
Date
Apr 3, 2024
Type
docx
Pages
5
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Question 1
What is the mass of the system made of the wooden block and the soda can (or the other object that you are using)?
390 G
Question 2
Convert the mass measured in Question 1 to its weight in Newtons. This is the value of F
N
that will be used in the calculations for the tables.
.39 x 9.8 m/s=3.822 N
SURFACES
Wood / Wood (larger surface)
For this case, we will use the larger surface of the wooden block as was shown in Figure 1. Measure F
s
and F
k
as indicated in Section 3.1. Run 5 trials, completing Table 1 below.
Wood/Wood (larger surface block)
Force Static Friction
Force Kinetic Friction
Coefficient. Static Friction
Coefficient Kinetic Friction
Trial 1
2.2
1.5
.576
.392
Trial 2
2.3
1.4
.602
.366
Trial 3
2.2
1.5
.576
.392
Trial 4
2.1
1.4
.549
.366
Trial 5
2.1
1.4
.549
.366
Average
2.18
1.44
.5704
.3764
Standard Deviation
.007
.0042
.000265
.000406
Wood / Wood (smaller surface)
For this section, turn the wooden block on its side as shown in Figure 2 and repeat the experiment, completing Table 2.
Copyright © 2017 by Thomas Edison State University. All rights reserved.
.
Figure 2: Wooden block on its side (courtesy of Chad Saunders, TESU student)
Wood/Wood (smaller surface block)
Force Static Friction
Force Kinetic Friction
Coefficient. Static Friction
Coefficient Kinetic Friction
Trial 1
1.5
1.3
.576
.34
Trial 2
1.3
1.3
.34
.34
Trial 3
1.2
1.1
.314
.288
Trial 4
1.5
1.3
.576
.34
Trial 5
1.4
1.2
.366
.314
Average
1.38
1.24
.4344
.3244
Standard Deviation
.017
.008
.017
.0005408
Wood / Glass
For this section, use the glass surface of your wooden block to repeat the measurements and complete Table 3.
Wood/Glass
Force Static Friction
Force Kinetic Friction
Coefficient. Static Friction
Coefficient Kinetic Friction
Trial 1
.8
.8
.209
.209
Copyright © 2017 by Thomas Edison State University. All rights reserved.
Trial 2
.8
.7
.209
.183
Trial 3
.9
.8
.235
.209
Trial 4
.9
.8
.235
.209
Trial 5
.8
.7
.209
.183
Average
.84
.76
.2194
.1986
Standard Deviation
.003
.003
.0002028
.0002028
Other surfaces
Repeat the measurements using other surfaces (for example, Wood / Sandpaper, Wood / Carpet, Glass / Carpet, etc.) When completing Table 4 below, make sure that you indicate the surfaces you used.
Wood/Countertop
Force Static Friction
Force Kinetic Friction
Coefficient. Static Friction
Coefficient Kinetic Friction
Trial 1
1.1
.7
.288
.183
Trial 2
1.1
.8
.288
.209
Trial 3
1.4
.7
.366
.183
Trial 4
1.1
.7
.288
.183
Trial 5
1.2
.8
.314
.209
Average
1.18
.74
.3088
.1934
Standard Deviation
.017
.003
.00115
.002028
ANALYSIS OF RESULTS
QUESTION 3 Study the results from Table 1 and Table 2. What can you conclude about these results?
Table 2 required less force to initially move and keep the block moving most likely because of the lower
surface area and less friction between the surfaces. Copyright © 2017 by Thomas Edison State University. All rights reserved.
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