Lab 7 Worksheet PHY 112
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PHY112 Lab 7
Name: Force on a Wire
Section: Download and open the Lab 7 Excel Simulation. You may receive a notification that macros are disabled. You can disable the macros, or you can change the direction of the battery and magnet manually by clicking on the drop-down in the appropriate cells. If you change these manually, the simulation diagrams will no longer match. Part 1 – Observations
1.
What is the weight of the magnet? 2.
Set the magnetic field strength to 0.2 T
, the current in the wire to 1.0 A
, and the length of the wire to 0.01 m. Use the flip battery and flip magnet buttons to change the direction of the battery and magnet.
Create each of the following arrangements, and record your observations in the data table below. Direction of the magnetic field
Direction of the current in the field
Direction of the force on the wire
Reading on the scale
increased or decreased
-
z
Left
-y
Increased 0.002N
-
z
Right
-y
Decreased 0.002 N
+
z
Left
+y
Decreased 0.002 N
+
z
Right
+y
Increased 0.002 N
The weight of the magnet is 120N or 27.3lbs
Conversion from newtons to pounds: 120N = 1lb/4.4N = 27.3lbs
What conclusions can you draw from these observations? Be specific.
3.
Enact each of the changes shown below on the system. Record your qualitative observations on the data table below. Make sure that you change the system one variable at a time (do not change all three at the same time).
Change to system
Force on wire increases or
decreases
Increase magnetic field
strength
increases
Increase current in the wire
increases
Increase length of wire in the
field
increases
Part 2 – Data Collection 4.
In this section, you will collect three sets of data and produce a graph for each data set. Complete each of the data tables, and create a properly labeled graph. Remember, change only one variable at a time while holding all other variables constant.
Force versus magnetic field strength
Magnetic field strength (
T
)
Force on the wire (
N
)
0.2
0.002
0.4
0.004
0.6
0.006
0.8
0.008
From these observations, I can conclude that depending on the location and direction of the battery and the magnet, the force acting on the magnet will either increase or decrease by 0.002 N.
1.0
0.01
5.
Create a scatter plot of the data. Apply a linear fit and include the equation. Properly label the graph, and copy and paste it below.
6.
According to the graph, what is the relationship between force on a wire and magnetic field strength? If the magnetic field strength doubles, what happens to the force on the wire? 7.
Force versus current in the wire Current in the wire (
A
)
Force on the wire (
N
)
1.0
0.002
3.0
0.006
6.0
0.012
9.0
0.018
12.0
0.024
The relationship between force on a wire and magnetic field strength is that as the magnetic field strength increases, the force on the wire also increases. We can see on the graph a positive linear correlation. When the magnetic field strength doubles, the force on the wire also doubles. We can see that when the magnetic field strength was 0.2T the force on the wire was 0.002N. We the magnetic field strength was double to 0.4T the force on the wire also double and we got 0.004N.
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8.
Create a scatter plot of the data. Apply a linear fit and include the equation. Properly label the graph, and copy and paste it below:
9.
According to the graph, what is the relationship between force on a wire and current in the wire? If the current in the wire doubles, what happens to the force on the wire? 10.
Force versus length of wire in field
Length of wire in field (
m
)
Force on the wire (
N
)
0.01
0.002
0.02
0.004
0.03
0.006
0.04
0.008
0.05
0.01
11.
Create a scatter plot of the data. Apply a linear fit and include the equation. Properly label the graph, and copy and paste it below:
The relationship between force on a wire and current in the wire is that as we increase the current in the wire, the force on the wire also increases. We see a positive linear relationship on our graph and data table. If the current in the wire doubles, the force on the wire also doubles. For example, when the current in the wire was 3A, the force on the wire was 0.006N. When we double the current to 6A, the force on the wire doubled to 0.012N.
12.
According to the graph, what is the relationship between force on a wire and length of wire in the field? If the length of the wire in the field doubles, what happens to the force on the wire? Part 3 – Analysis
Use your data and graphs to answer each of the following questions: 13.
Look up the accepted equation for force on a current bearing wire. How do your results compare? Be specific. The relationship between force on a wire and length of wire in the field is that as the length of the wire field increases, the force on the wire also increases. We can see on our graph a positive linear correlation between these two variables. If the length of the wire in the field doubles, the force on the wire also doubles. For example, when the length of the wire is 0.01m, the force on the wire is 0.002N. When the length of the wire doubles to 0.02m the force on the wire also doubles to 0.004N. The accepted equation for force on a current bearing wire is F = IL x B. Where F is force, I is current,
L is the length of the wire and B is the magnetic field strength. My results are perfectly compatible with this equation. As we increased the length of the wire, the current on the wire, and the magnetic field strength, we also saw an increase in the force on the wire. If we were to decrease the magnetic field strength, then the force on the wire would also decrease which would also be the same result if we were to decrease the current and/or length of the wire.
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Also String 1
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EJ
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Situation 9 - A 6-m long ladder weighing 600 N is shown in the Figure. It is required to determine
the horizontal for P that must be exerted at point C to prevent the ladder from sliding. The
coefficient of friction between the ladder and the surface at A and B is 0.20.
25. Determine the reaction at A.
26. Determine the reaction at B.
27. Determine the required force P.
4.5 m
1.5 m
H=0.2
30°
Page 5 of 5
671 words
D. Focus
100%
C
ЕPIC
GAMES
ENG
7:24 pm
w
US
16/02/2022
IZ
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weight bearing activities.
Your boss asks you to review the technical report that was generated by the previous test engineer (whose job you now have!) and used to
verify the design. The brief report states the following... "Ti Fix-It plates were manufactured from Ti-6Al-4V (grade 5) and machined into
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. Then click to start and
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force, that is the force when it is equal to static friction
force. It is the maximum value of force that appears in
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Record its value from graph. Fs (static max) = _ N
Keep looking the lab quest and see when the value of
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move back and forth between the springs.
www
Draw a force-time graph showing the sum of the horizontal forces exerted on the
cart as it moves back and force between the springs.
Scientific Abilities
Is able to construct a
force diagram
Missing
No representation is
constructed.
Inadequate
FD is constructed but
contains major errors such
as incorrect mislabeled or
not labeled force vectors,
length of vectors, wrong
direction, extra incorrect
vectors are added, or
vectors are missing.
Needs Improvement
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Part 2
Set up a spreadsheet solution to this problem. This will require that you derive one
formula to express the relationship between the friction coefficient, the spring constant,
and the spring compression; and a second formula to find the cost of using different slide
and spring types. Set up your spreadsheet as shown below. You can fill in the
"Acceptable?" column manually, rather than using a formula. Turn in a copy of your
spreadsheet/Matlab work
(solve for $)
Friction Spring Constant Spring Compression
M
k
0.1
0.1
0.1
0.2
0.2
0.2
50
100
150
50
100
150
4
Part 3
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above, determine how far below the slide (h) to place the hole in the drop box.
Yo = 5.2017/5
BLADE
2
RAMPE SLIDE
8⁰
SLIDE
Acceptable?
(Yes or No)
$'
Cost
51
In
DROP…
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