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Introduction During this laboratory you will be a little more familiar with the concepts of torque. The purpose of this lab is always to determine if the rotational sense of balance condition, ОЈП„ = 0, holds experimentally. Equipment Inmiscuirse stick (1) - zero metal ends Fulcrum (1) Clamps (4) Weight Hanger (1) Mass Set (1) Digital Range (1)
Theory For a human body to be in static balance, two conditions have to be attained:
ОЈF = 0 and ОЈП„ = 0
exactly where F is force and П„ is torque. (The torque is the force occasions the handle arm, r) The initial condition, ОЈF = zero, is concerned with translational sense of balance and makes certain that the object reaches rest or is shifting at a uniform linear velocity. The other condition, ОЈП„ = 0, is concerned with rotational balance and ensures that the object is not spinning or is rotating in a homogeneous angular velocity. Special Guidance Goals -- One of the primary goals of this research laboratory is appropriate measurement with attention to detail and the use of the correct volume of significant statistics. I know that you may finish this lab quickly вЂ“ although don't. Press as much accuracy as you can away of this pair of equipment. Come up with ways of staying away from errors and inaccuracies rather than explaining them away inside the lab survey. Units -- In this laboratory you will find that convenient to use grams as the mass unit and centimeters as the space measure. The size of the torque balance equations allows us to make use of this short cut for convenience within this lab. Tools Procedures Fulcrum Placement - Raise the fulcrum with a Research laboratory Jack or perhaps by a textbook placed under that if the excess weight hangers are too long and touch the very best surface of the lab table. Gram Weight load - In the four (4) cases under the mass quantities called for would be the amounts of mass to be added to the excess weight hangers. When conducting the calculations of the rpm you will need to utilize the Total Mass for each. The whole is the mass of the Clamp, the mass of the Weight Hanger and the added mass.
14a Rpm A RGC. doc
Meter Stick Set Up - Measure the mass of a colocar stick by itself, without any clamps on it. Eliminate the " V-shapedвЂќ wire from your clamp that will assist as the meter keep balance revolves. Place the clamp on the m stick with the tightening attach pointing down - do not tighten the screw however. This alignment of the tensing screw is important to place the middle of mass below the pivot point so that a stable balance position is available for the meter adhere. Place the colocar stick on a fulcrum support stand. Inmiscuirse Stick Balance - Go the colocar stick through the clamp towards the middle of the colocar stick (50. 0 cm) and place this on the fulcrum. Adjust the relative location of the meter stick in the clamp until the stick is usually balanced for the fulcrum stand. This balancing point is called the center of mass in the meter stick and it must be at 40. 0 centimeter plus or minus a number of mm. Record this value, read off of the meter stay scale, because the meter stick centre of mass x0 in the Data Stand. Experimental Procedures (For every setup, attract a scale diagram in the setup) Case 1 . With the meter adhere on the support stand, hang a mass m1 sama dengan 100g on the 15cm tag on the colocar stick. In that case adjust the lever adjustable rate mortgage for a mass m2 = 200 g at the opposite end of the colocar stick. Record the masses and the x-position as keep reading the colocar stick then calculate and record the lever hands. Compute the torques and discover a percent difference between the clockwise (П„cw) torques and counterclockwise (П„cc) torques. Record the % Difference benefit on your Info Sheet. Case 2 . Place m1 = 100 g at the 20-cm mark and m2 = 200 g is at the 60-cm tag on the inmiscuirse stick. Experimentally determine the positioning for m3 = 50 g so the system is in equilibrium. Stick to procedure comparable to steps 2 and a few. Compute the percent difference between the clockwise and counterclockwise torques. Case 3. Place an unknown mass at the 10-cm mark in the meter keep. Suspend in the other part of the centre of mass of the meter stick a counter mass m2 sama dengan 200...
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