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.
** Your optional message or comment: **
** 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: **
4.2cm,8.9cm,11.8cm
7.8cm,8.5cm,7.6cm
-1.48n,1.61n,-1.44n
the end of the bolt
i multiplied the length by .19 to get the force.
the first line is the position of the rubber bands on the graph the second line is the length of the rubber bands and the third line is the force of the rubber band
** Net force and net force as a percent of the sum of the magnitudes of all forces: **
-1.31
5%
i added all three of the absolute forces and then divided by the net force
** Moment arms for rubber band systems B and C **
b=6.9ncm,c=5.4ncm
i have multiplied a force times a distances which tells me the load at each point.
** Lengths in cm of force vectors in 4 cm to 1 N scale drawing, distances from the fulcrum to points B and C. **
b=7.8cm,a=8.5cm,c=7.6cm
b to a =4.7cm, a to c=3.8cm
the numbers are the forces and distances from the hinge point
** Torque produced by B, torque produced by C: **
11.5ncm,-10.9ncm
this is the torque of the rubber band
** Net torque, net torque as percent of the sum of the magnitudes of the torques: **
.6
2% net torque
the first number is the difference in torques and the second number is the percent of net torque i took the absolute torque and divided by the net torque.
** Forces, distances from equilibrium and torques exerted by A, B, C, D: **
** 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: **
** Net torque for given picture; your discussion of whether this figure could be accurate 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: **
** 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: **
** In the second setup, were the forces all parallel to one another? **
** Estimated angles of the four forces; short discussion of accuracy of estimates. **
** x and y coordinates of both ends of each rubber band, in cm **
** Lengths and forces exerted systems B, A and C:. **
** Sines and cosines of systems B, A and C: **
** Magnitude, angle with horizontal and angle in the plane for each force: **
** 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): **
** Sum of x components, ideal sum, how close are you to the ideal; then the same for y components. **
** Distance of the point of action from that of the leftmost force, component perpendicular to the rod, and torque for each force: **
** Sum of torques, ideal sum, how close are you to the ideal. **
** How long did it take you to complete this experiment? **
** Optional additional comments and/or questions: **
Good work, good results.