Next place an equal mass on both the fixed mass arm

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move within the slot because if student doesn’t allow in to slide, they will get a false reading. Next place an equal mass on both the “fixed mass” arm and the “free mass” arm. The student must make sure that that “free mass” and “fixed mass” have the same radius, so the motor will be balanced when rotating. Adjust the height of the force sensor or the rotating platform, that way the masses maintain the same radius. Then pull the “free” mass to tighten the cable to determine the actual radius. Then turn on the power supply and adjust the voltage from 0 to no more then 7V. The students will observe the vertical section of cable. If it is not completely vertical, adjust the horizontal rod. While the instrument is running steadily, turn up the voltage on the power supply, there by speeding up the motor. When running, the instrument will be continuously plotting Force vs. angular velocity. Turn the power supply down to 0V to stop the motor. Press the “ZERO” button on the Force Sensor, then select the start button in Datastudio. Turn on the power supply and adjust the voltage from 0 to 7 volts. Do not exceed 10V on the power supply. Press Stop in DataStudio when the voltage reaches 7 volts. Turn off motor by turning down the voltage. Analysis part of this part is observing the Force vs. Linear Velocity Graph. Select the “fit” button and choose the appropriate fit for the data. The student will look at it and make sure that the graph looks like it should then saves it. The second part of the experiment force vs. mass(radius and velocity must be constant). In this part of the experiment, the radius and velocity are held constant as the mass is varied . By adding additional drilled masses to the rotating platform, the mass of the system is increased. Equal amounts of mass must be added to both the “fixed mass” and “free mass” side to balance the rotating platform and centripetal force is directly measured by the Force Sensor. Be careful to keep velocity constant and record the force data only for the same angular velocity. To start the experiment the student will open the Science Workshop file:
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Force_mass SW, then they must find the total mass of their weight. Enter that value in kilograms ( so mass (g)/1000) into the force vs. Mass data table in DataStudio. To add mass to either of the arms, lay the components over the attachment screw in the following order: i) cable ii) mass and iii) thumbscrew. Next allow the “free mass” to move(slide) within the slot. To avoid wobbling place an equal amount of mass on both the “fixed mass” arm and the “free mass” arm. Once again the student must make sure that the “free mass” and “fixed mass” have the same radius so the motor will be balanced when rotating. Then turn on the power supply and adjust the voltage from 0 to 5 volts. Observe the vertical section of cable. If it is not completely vertical, student should adjust the horizontal rod. Then turn the power supply down to 0V.
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