Case 2: Painters on a Scaffold Two painters with different masses are standing on a scaffold of a certain length and different distances from each end. The cables supporting the scaffold are vertical and attached to each end. What is the tension in each cable? Set up this system based on the figure using a meter stick or yard stick. Tie two strings about 50 cm long to each end of the stick. The other end of each string should have a loop in it for attaching the spring scale. Case 2 Example 1 Show All An experimental example of the painters on a scaffold word problem. Tie or hang two objects with different masses from two points on the stick. The locations should be chosen so that the system is not symmetrical (not the same distance from each end of the stick). Hold the strings so that the stick is horizontal. Record the distances, masses, and the mass of the stick (usually around 100 grams) on the Report Sheet. Solve for the tension in each string.

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Case 2: painters on a scaffold Weight of object 1: 350g Weight of object 2: 181 g Weight of stick : 100g Location of string 1 : 4 cm Location of string 2: 88cm Center of mass of stick: 50 cm Location of object 2: 17cm Location of string 2 : 66cm Measured tension 1: 6N Measured tension 2 : 5.5 N Please provide equations and calculations.
The three conditions of static equilibrium are:
Lesson 12 Lab: Static Equilibrium
●
●
Introduction
●
Materials
In words, the sum of all the forces acting in the x-direction is zero; the sum of all the forces acting in the y-direction is zero;
and the sum of all the torques is zero.
Introduction
In this experiment, we will verify the static equilibrium conditions by re-creating three static equilibrium word problems. The
choice of force magnitudes, points of application and angles will be a matter of personal choice. The goal is to calculate all
forces for each system and compare the results to measured values.
Data Collection...
Statics Report Sheet (Download and print)
A meter stick or yardstick
A 5.0 N spring scale
Case 1 Example 1
ΣF = 0
ΣF, = 0
ΣΤ = 0
● String
Three objects with masses between 100-500 grams
A ruler and protractor
Conclusions
Materials
Data Collection and Analysis
Case 1: Traffic Light
A traffic light is hanging from two wires set at known angles. What is the magnitude of the tension in each wire?
Set up this system based on the figure. Hang an object of known mass from the center of a meter-long string with
loops on both ends for attaching the spring scale. It may be easier to tie a second shorter string to the center of the
first string and tie the object to the short string. Hold the long string in such a way that two different angles, 0₁ and 0₂,
are formed. It may be helpful to have an assistant, or tie one end of the string to a fixed object.
Show All
Transcribed Image Text:The three conditions of static equilibrium are: Lesson 12 Lab: Static Equilibrium ● ● Introduction ● Materials In words, the sum of all the forces acting in the x-direction is zero; the sum of all the forces acting in the y-direction is zero; and the sum of all the torques is zero. Introduction In this experiment, we will verify the static equilibrium conditions by re-creating three static equilibrium word problems. The choice of force magnitudes, points of application and angles will be a matter of personal choice. The goal is to calculate all forces for each system and compare the results to measured values. Data Collection... Statics Report Sheet (Download and print) A meter stick or yardstick A 5.0 N spring scale Case 1 Example 1 ΣF = 0 ΣF, = 0 ΣΤ = 0 ● String Three objects with masses between 100-500 grams A ruler and protractor Conclusions Materials Data Collection and Analysis Case 1: Traffic Light A traffic light is hanging from two wires set at known angles. What is the magnitude of the tension in each wire? Set up this system based on the figure. Hang an object of known mass from the center of a meter-long string with loops on both ends for attaching the spring scale. It may be easier to tie a second shorter string to the center of the first string and tie the object to the short string. Hold the long string in such a way that two different angles, 0₁ and 0₂, are formed. It may be helpful to have an assistant, or tie one end of the string to a fixed object. Show All
Case 2: Painters on a Scaffold
Two painters with different masses are standing on a scaffold of a certain length and different distances from each end. The cables supporting the
scaffold are vertical and attached to each end. What is the tension in each cable?
Set up this system based on the figure using a meter stick or yard stick. Tie two strings about 50 cm long to each end of the stick. The other end of
each string should have a loop in it for attaching the spring scale.
Case 2 Example 1
V
An experimental example of the painters on a scaffold word problem.
Tie or hang two objects with different masses from two points on the stick. The locations should be chosen so that the system is not symmetrical (not
the same distance from each end of the stick). Hold the strings so that the stick is horizontal.
Record the distances, masses, and the mass of the stick (usually around 100 grams) on the Report Sheet. Solve for the tension in each string.
Case 2 Example 2
Show All
Show All
An experimental example of the painters on a scaffold word problem with spring scale added.
You can set the system down while you are doing this, or you can immediately measure the two tensions before doing the calculation. In either case,
when measuring the tensions make sure the stick is horizontal.
Carefully attach the spring scale to the loop of one string by holding the loop with the hook, making sure that the spring scale is vertical and the stick.
remains horizontal. Record the tension, T₁, on the Report Sheet. Repeat this procedure for the other string, recording the second tension, T₂, on the
Report Sheet. Compare the calculated tensions with the experimental values measured by the spring scale.
Note: all angles between applied forces and the horizontal stick are 90 degrees.
Transcribed Image Text:Case 2: Painters on a Scaffold Two painters with different masses are standing on a scaffold of a certain length and different distances from each end. The cables supporting the scaffold are vertical and attached to each end. What is the tension in each cable? Set up this system based on the figure using a meter stick or yard stick. Tie two strings about 50 cm long to each end of the stick. The other end of each string should have a loop in it for attaching the spring scale. Case 2 Example 1 V An experimental example of the painters on a scaffold word problem. Tie or hang two objects with different masses from two points on the stick. The locations should be chosen so that the system is not symmetrical (not the same distance from each end of the stick). Hold the strings so that the stick is horizontal. Record the distances, masses, and the mass of the stick (usually around 100 grams) on the Report Sheet. Solve for the tension in each string. Case 2 Example 2 Show All Show All An experimental example of the painters on a scaffold word problem with spring scale added. You can set the system down while you are doing this, or you can immediately measure the two tensions before doing the calculation. In either case, when measuring the tensions make sure the stick is horizontal. Carefully attach the spring scale to the loop of one string by holding the loop with the hook, making sure that the spring scale is vertical and the stick. remains horizontal. Record the tension, T₁, on the Report Sheet. Repeat this procedure for the other string, recording the second tension, T₂, on the Report Sheet. Compare the calculated tensions with the experimental values measured by the spring scale. Note: all angles between applied forces and the horizontal stick are 90 degrees.
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