PHY 122 Lab 9: Static Equilibrium and Torque
Evan Newman
Partners: Monica Welfert and Madeleine Howell
Group 7
TA: Kevin Hatch
Section 13740
Friday, 2:00-3:50 pm
This study source was downloaded by 100000850872992 from CourseHero.com on 04-17-2023 22:07:00 GMT -05:00
https://www.coursehero.com/file/21720255/Lab-9-Static-Equilibrium-and-Torque/
, Objective:
The objective of this experiment was to verify the conditions for static rotational
equilibrium with a meter stick on a pivot, first by determining the center of gravity of the stick,
mass of the stick, and mass of a hanging object using known torques, and second by determining
the location of a known force such that equilibrium is achieved.
Experimental Data:
Mass of slider 1: 𝑠1 = 0.0210 𝑘𝑔
Mass of slider 2: 𝑠2 = 0.0229 𝑘𝑔
Mass of slider 3: 𝑠3 = 0.0209 𝑘𝑔
Mass of meter stick: 𝑚0 = 0.0894 𝑘𝑔
Center of gravity position: 𝑥𝑔 = 0.503 𝑚
Experiment 1
Object Slider Mass m (kg) Position x (m) Lever arm d (m) Torque τ (N∙m) % diff.
1 3 0.1209 0.100 0.403 0.477 (ccw)
1.66%
2 1 0.2210 0.727 0.224 0.485 (cw)
Experiment 2
Object Slider Mass m (kg) Position x (m) Lever arm d (m) Torque τ (N∙m) % diff.
1 3 0.1209 0.100 0.403 0.529 (ccw)
2 1 0.2210 0.750 0.247 1.13%
3 2 0.0729 0.431 0.072 0.535 (cw)
Experiment 3
Support position 𝑥0 = 0.216 𝑚
Object Slider Mass m (kg) Position x (m) Lever arm d (m) Exp. m0 (kg) % error
1 1 0.2210 0.100 0.116
0.0893 0.112%
stick N/A 𝑚0 = 0.0894 𝑥𝑔 = 0.503 0.287
Experiment 4
Support position 𝑥0 = 0.380 𝑚
Object Slider Mass m (kg) Pos. x (m) Lever arm d (m) Exp. mUSB (kg) % error
USB drive 1 0.0391 0.100 0.280
0.0393 0.512%
stick N/A 𝑚0 = 0.0894 𝑥𝑔 = 0.503 0.123
This study source was downloaded by 100000850872992 from CourseHero.com on 04-17-2023 22:07:00 GMT -05:00
https://www.coursehero.com/file/21720255/Lab-9-Static-Equilibrium-and-Torque/
Evan Newman
Partners: Monica Welfert and Madeleine Howell
Group 7
TA: Kevin Hatch
Section 13740
Friday, 2:00-3:50 pm
This study source was downloaded by 100000850872992 from CourseHero.com on 04-17-2023 22:07:00 GMT -05:00
https://www.coursehero.com/file/21720255/Lab-9-Static-Equilibrium-and-Torque/
, Objective:
The objective of this experiment was to verify the conditions for static rotational
equilibrium with a meter stick on a pivot, first by determining the center of gravity of the stick,
mass of the stick, and mass of a hanging object using known torques, and second by determining
the location of a known force such that equilibrium is achieved.
Experimental Data:
Mass of slider 1: 𝑠1 = 0.0210 𝑘𝑔
Mass of slider 2: 𝑠2 = 0.0229 𝑘𝑔
Mass of slider 3: 𝑠3 = 0.0209 𝑘𝑔
Mass of meter stick: 𝑚0 = 0.0894 𝑘𝑔
Center of gravity position: 𝑥𝑔 = 0.503 𝑚
Experiment 1
Object Slider Mass m (kg) Position x (m) Lever arm d (m) Torque τ (N∙m) % diff.
1 3 0.1209 0.100 0.403 0.477 (ccw)
1.66%
2 1 0.2210 0.727 0.224 0.485 (cw)
Experiment 2
Object Slider Mass m (kg) Position x (m) Lever arm d (m) Torque τ (N∙m) % diff.
1 3 0.1209 0.100 0.403 0.529 (ccw)
2 1 0.2210 0.750 0.247 1.13%
3 2 0.0729 0.431 0.072 0.535 (cw)
Experiment 3
Support position 𝑥0 = 0.216 𝑚
Object Slider Mass m (kg) Position x (m) Lever arm d (m) Exp. m0 (kg) % error
1 1 0.2210 0.100 0.116
0.0893 0.112%
stick N/A 𝑚0 = 0.0894 𝑥𝑔 = 0.503 0.287
Experiment 4
Support position 𝑥0 = 0.380 𝑚
Object Slider Mass m (kg) Pos. x (m) Lever arm d (m) Exp. mUSB (kg) % error
USB drive 1 0.0391 0.100 0.280
0.0393 0.512%
stick N/A 𝑚0 = 0.0894 𝑥𝑔 = 0.503 0.123
This study source was downloaded by 100000850872992 from CourseHero.com on 04-17-2023 22:07:00 GMT -05:00
https://www.coursehero.com/file/21720255/Lab-9-Static-Equilibrium-and-Torque/
