Lab #7 torque.docx - Jasmine Phutornsri Lab#7 Torque Objective The purpose of this lab is to see the relationship between force distance and angle

Lab #7 torque.docx - Jasmine Phutornsri Lab#7 Torque...

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Jasmine Phutornsri Lab #7 Torque 10/10/2018 Objective The purpose of this lab is to see the relationship between force, distance, and angle. Materials - Computer station #1 - Creed Anderson (5) - Logger Pro Program - LabQuest Mini Interface - Force Probe - Slotted weight set and hanging mass - Digital Scale - Lever arm-meterstick on base - Ring stand and post clamp - Meterstick clamp - String - Meterstick - level Preliminary Questions 1. C, B, A 2. A, B, C 3. Yes, the see-saw is balanced due to the forces having the same torque. Sum torque = 3m * 25N – 1.5 m * 500 N = 0 Part I: Analyzing torque by force and radius Torque depends on three things, force, radius, and angle. For this part of the experiment, you are going to keep the angle between the string and meter stick at a constant 90-degree angle. The radius of the string will be changed to see how it affects the force require to maintain a constant torque. Procedure: 1. Calculating: weight, radius, angle (90 degrees) a. Weigh the meterstick, record on table 1 b. Record the center of mass location by hanging the meterstick on a string c. Calculate force due to the weight of the meter stick by multiplying by 9.8 m/s2 d. Determine pivot point position e. Calculate radius by finding the distance between the axis point and the center of mass position; record in meters f. Calculate torque due to the weight of meterstick
g. Is the torque due to meterstick weight going to cause clockwise or counterclockwise rotation about the axis? Is this positive or negative torque? i. The torque due to the meter stick is going counterclockwise and is an example of positive torque. Data Table 1: Meter stick torque Mass (kg) Weight = mg (N) Center of mass position (cm) Axis point offset (cm) Radius (m) Torqu + Wrsin (90) (Nm) 0.206 kg 2.02 N 49 cm 1.5 cm 0.475 m 0.9595 Nm 2. Setup torque apparatus; the meter stick should be attached to a base with a nut and screwed and free to rotate. Attach the force probe to a small rod and secure it to the ring

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• Spring '14
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