Your 'torques' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
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Positions of the three points of application, lengths of systems B, A and C (left to right), the forces in Newtons exerted by those systems, description of the reference point:
.8,8.0,12.1
7.7,7.8,8.5
.78,1.82,1.9
left side of the horizontal line
The first and last were obtained from matching the cm in length to the corresponding N on that certain graph, the middle one since there was two rubber band these were added together.
Net force and net force as a percent of the sum of the magnitudes of all forces:
-.78
17.3
Moment arms for rubber band systems B and C
7.4,4.2
Lengths in cm of force vectors in 4 cm to 1 N scale drawing, distances from the fulcrum to points B and C.
3.12,7.28,7.6
7.4,4.2
Torque produced by B, torque produced by C:
-7.6,+5.7
Net torque, net torque as percent of the sum of the magnitudes of the torques:
-1.9
14.3
-7.6 + 5.7=-1.9, then divide this by 7.6+5.7=13.3, multiply by 100 to get 14.3
Forces, distances from equilibrium and torques exerted by A, B, C, D:
1.86,0,0
-1.47,1.7,-2.5
-1.00,9.4,-9.4
.13,13.5,1.76
The sum of the vertical forces on the rod, and your discussion of the extent to which your picture fails to accurately describe the forces:
-.48
The forces should total to 0 since there is no movement of the rod.
Net torque for given picture; your discussion of whether this figure could be accurate for a stationary rod:
6
no the value should be 0 for a stationary rod
For first setup: Sum of torques for your setup; magnitude of resultant and sum of magnitudes of forces; magnitude of resultant as percent of sum of magnitudes of forces; magnitude of resultant torque, sum of magnitudes of torques, magnitude of resultant torque as percent of the sum of the magnitudes:
-10.14
-.48,4.46
10.8
-10.14,13.66,74
For second setup: Sum of torques for your setup; magnitude of resultant and sum of magnitudes of forces; magnitude of resultant as percent of sum of magnitudes of forces; magnitude of resultant torque, sum of magnitudes of torques, magnitude of resultant torque as percent of the sum of the magnitudes:
-6.13
.5,4.54
11
-6.13,28.01,
22
In the second setup, were the forces all parallel to one another?
10
Estimated angles of the four forces; short discussion of accuracy of estimates.
90,100,100,100
The placement of the rubber bands and hooks was difficult so I suspect the results are not extremely accurate.
x and y coordinates of both ends of each rubber band, in cm
1.2,2,2.1,10.5
7.6,15.8,5.8,23.9
16.3,10.5,21.7,3.7
Lengths and forces exerted systems B, A and C:.
8.5,1.86
8.3,3.55
8.7,2.53
Measured the first value in cm then found the coordinate force value that matched on the graph.
Sines and cosines of systems B, A and C:
-90,-84.0
77.4,-77.5
-51.4,51.6
Magnitude, angle with horizontal and angle in the plane for each force:
8.5,84.0,264
8.1,-77.5,102.5
8.7,-51.55,308.5
x and y components of sketch, x and y components of force from sketch components, x and y components from magnitude, sine and cosine (lines in order B, A, C):
-5.6,12.7,-1.4,3.18,-.768,3.46
-.5,-7.1,-.125,-1.78,-.194,-1.86
7,-14,1.75,-2,1.57,-1.98
Sum of x components, ideal sum, how close are you to the ideal; then the same for y components.
.608,0,.608
-.38,0,-.38
Distance of the point of action from that of the leftmost force, component perpendicular to the rod, and torque for each force:
0,-1.86,0
6.4,3.46,22.14
15.11,-1.98,-29.92
Sum of torques, ideal sum, how close are you to the ideal.
-7.78,0,7.78
How long did it take you to complete this experiment?
5 hrs
Optional additional comments and/or questions:
Your work on this experiment looks good.
Please let me know if you have any questions related to this orientation assignment.