report 7 - Bryan Kim PHY131L PHYSICS REPORT EXPERIMENT 7...

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Bryan Kim 2/28/07 PHY131L PHYSICS REPORT – EXPERIMENT 7 Objective To calculate the torque force on a meter stick Equipments Meter stick with predrilled holes Fulcrum stand Small weight set (4 weights) Triple beam balance Lab jack Two slotted weight sets Three weight holders Meter stick clamp Procedure For part A, we put the meter stick on the fulcrum and balanced it. Although, theoretically, the center of mass should be exactly at 50cm point, in reality, it was at 49.3cm point. Part B, at this point, we put 200g on the 10cm mark. For the second torque point, we put the weight holder at 70cm mark and added additional weights until the meter stick was again at balance. The system was in static equilibrium when we put 484g at the 70cm mark. For the third part, we measured the mass of the meter stick on the triple beam balance. Then, we moved the fulcrum point from 49.3cm mark to 30cm mark, but kept the weight hanger points at 10cm and 70cm. Leaving the 200g on the left hangar, we tried to adjust the weight on the right side of the fulcrum to make the system in static equilibrium.
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