Point body of mass hung from a ceiling on two ropes

  • Thread starter Thread starter Simon Akbar
  • Start date Start date
  • Tags Tags
    Body Mass Point
Click For Summary

Homework Help Overview

The problem involves an object weighing 8.0 N supported by two ropes at angles to the horizontal, with tensions T1 and T2. The angles are given as 30 degrees and 60 degrees, and the participant has calculated the tensions but seeks to understand how to determine the maximum tension and the minimal required tensile strength of the ropes.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants discuss finding a generic function for T1 and T2 in relation to the angles and exploring maxima/minima of that function. Questions arise about the definition of maximum tension and whether it refers to the larger of the two tensions or something else.

Discussion Status

The discussion is ongoing with various interpretations of the maximum tension being explored. Some participants suggest re-evaluating calculations without specific angle values, while others question the relationship between the tensions and the tensile strength of the ropes.

Contextual Notes

There is mention of needing to keep certain angles constant while varying others, and participants are encouraged to clarify the entire problem statement for better understanding. The relationship between the tensions and the tensile strength of the ropes is also under scrutiny.

Simon Akbar
Messages
4
Reaction score
0

Homework Statement


An object weighing 8.0 N is supported by two rope, which form the angles a and b to the horizontal, with tensions T1 and T2.
angle a = 30 degrees
angle b = 60 degrees
I have calculated these values:
T1 = 4N
T2 = 6.93N

How do I find the maximum tension of the obtained tension forces?
How do find the minimal required tensile strength of the rope?

Homework Equations

The Attempt at a Solution

 
Physics news on Phys.org
Simon Akbar said:
How do I find the maximum tension of the obtained tension forces?
Simon Akbar said:
How do find the minimal required tensile strength of the rope?
Find the generic function for T1 and T2 in terms of angle they form with the horizontal and then find the maxima/minima of that function.
 
Simon Akbar said:
maximum tension of the obtained tension forces?
Maximum with respect to what, i.e. what is allowed to vary? Or maybe it is just the maximum of the two tensions?
Perhaps you should post the entire question, word for word.
 
q1) Find the larger value, Tmax , of the obtained tension forces.

q2) plot the minimal required tensile strength of the rope as a function of the angle a . Keep the mass and angle b the same.
 
Simon Akbar said:
q1) Find the larger value, Tmax , of the obtained tension forces.
Larger of T1 and T2 that you obtained in last post ?
 
Buffu said:
Larger of T1 and T2 that you obtained in last post ?
yes
If angle a is constant then angle b is also constant.
 
Then it is clear that T2 > T1 because I think 6.93 > 4.
 
If angle a is constant then angle b is also constant.

Sorry my mistake, if you change the position of rope T1 then a will change with b being constant.
Ignore this.
 
Simon Akbar said:
q2) plot the minimal required tensile strength of the rope as a function of the angle a . Keep the mass and angle b the same.
Then you need to redo your calculation for the two tensions, but this time without plugging in a number for angle a. Just keep it as a variable.
 
  • #10
haruspex said:
Then you need to redo your calculation for the two tensions, but this time without plugging in a number for angle a. Just keep it as a variable.
Is the sum of T1 and T2 equal to the minimal required tensile strength of the rope?
 
  • #11
Simon Akbar said:
Is the sum of T1 and T2 equal to the minimal required tensile strength of the rope?
The ropes do not know about each other. If you were to make one rope very strong, would that help the other rope avoid breaking?
 

Similar threads

  • · Replies 47 ·
2
Replies
47
Views
3K
  • · Replies 7 ·
Replies
7
Views
3K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 1 ·
Replies
1
Views
4K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 22 ·
Replies
22
Views
7K
  • · Replies 2 ·
Replies
2
Views
2K
Replies
16
Views
2K
  • · Replies 7 ·
Replies
7
Views
4K
  • · Replies 2 ·
Replies
2
Views
2K