Newton's Laws Homework question: Double incline mass problem

Click For Summary

Homework Help Overview

The discussion revolves around a double incline mass problem involving two blocks connected by a massless string, with specific angles and mass provided. The original poster attempts to apply Newton's second law to analyze the forces acting on the blocks, particularly focusing on the tension in the string.

Discussion Character

  • Exploratory, Assumption checking, Mathematical reasoning

Approaches and Questions Raised

  • Participants discuss the original poster's equations and the setup of the problem, questioning the clarity and correctness of the equations presented. There are inquiries about the forces acting on the blocks and the use of LaTeX for formatting equations.

Discussion Status

The conversation is ongoing, with some participants providing feedback on the clarity of the original poster's equations and suggesting a focus on one block to better understand the forces involved. There is no explicit consensus yet, as participants are still exploring the problem's setup and the original poster's attempts at formatting.

Contextual Notes

There are issues with image accessibility and formatting of equations that may be hindering the discussion. The original poster has expressed uncertainty about how to properly format their equations and share images directly in the forum.

NotSoRobot
Messages
2
Reaction score
0

Homework Statement


I have a double incline mass problem where Φ=43° and θ=20°, mass_A=1.00kg and they are connected by a massless string where the net force of each block is equal to 0.

Homework Equations


I believe I am to use Newton's 2nd law to find the force of the tension which I have next to my FBD. Since they were both 0 I set them equal to each other as you can see the arrows are directing in the photo, but I'm kind of lead nowhere. :/ I'll post the photo in 3.

My equations are:
$$\vec {T}_1 = m_A g + \hline \vec {T}_1 \cos {\phi}$$
and
$$\vec{T}_2=m_Ag+\hline \vec{T}_2\cos{\theta}$$
which I set equal to each other. I think this is how I would describe ##\vec{T}_1## and ##\vec{T}_2## with vector addition.

The Attempt at a Solution


https://livecsupomona-my.sharepoint.com/:i:/r/personal/dlsanjenis_cpp_edu/Documents/Attachments/52588613_813119429043085_4437430197272182784_n.jpg?csf=1&e=Ihd80l
[/B]
 

Attachments

  • 52606089_2336512989715836_7032607878858932224_n.jpg
    52606089_2336512989715836_7032607878858932224_n.jpg
    15.3 KB · Views: 401
  • massB.png
    massB.png
    4.7 KB · Views: 448
Last edited:
Physics news on Phys.org
Your first two images are behind some login barrier. Please upload them directly to the forum using the tools in the toolbar.

The image of your working is sideways-on and hard to read. The bits of equations I could decipher made no sense to me.
Start with one block. What are the forces acting on it? What equations can you write?
Please type in your answers. Images are for textbook extracts and diagrams.
 
haruspex said:
Your first two images are behind some login barrier. Please upload them directly to the forum using the tools in the toolbar.
I'm not sure how to put them directly into the forum. I need a link, perhaps I could see if I could make this particular line public.

Edit: I guess i just figured it out, I will improve the equations now.

2ndEdit: I'm not sure how to fix my forumlas. I used the correct delimiters, but there is something else I'm not catching.
 

Attachments

  • massB.png
    massB.png
    4.7 KB · Views: 423
Last edited:
NotSoRobot said:
I'm not sure how to put them directly into the forum. I need a link, perhaps I could see if I could make this particular line public.

Edit: I guess i just figured it out, I will improve the equations now.

2ndEdit: I'm not sure how to fix my forumlas. I used the correct delimiters, but there is something else I'm not catching.
I assumed you would be posting new equations. Are you still working on this?
You mention delimiters. Are you struggling with LaTeX?
 
Last edited:
NotSoRobot said:

Homework Statement


I have a double incline mass problem where Φ=43° and θ=20°, mass_A=1.00kg and they are connected by a massless string where the net force of each block is equal to 0.

Homework Equations


I believe I am to use Newton's 2nd law to find the force of the tension which I have next to my FBD. Since they were both 0 I set them equal to each other as you can see the arrows are directing in the photo, but I'm kind of lead nowhere. :/ I'll post the photo in 3.

My equations are:
$$\vec {T}_1 = m_A g +\color{red}{\text{ \hline }} \ \ \vec {T}_1 \cos {\phi}$$
and
$$\vec{T}_2=m_Ag+\color{red}{\text{ \hline} }\ \ \vec{T}_2\cos{\theta}$$
which I set equal to each other. I think this is how I would describe ##\vec{T}_1## and ##\vec{T}_2## with vector addition.

The Attempt at a Solution


https://livecsupomona-my.sharepoint.com/:i:/r/personal/dlsanjenis_cpp_edu/Documents/Attachments/52588613_813119429043085_4437430197272182784_n.jpg?csf=1&e=Ihd80l [/B]
Nothing wrong with your LaTeX delimiters. I placed the \hline in a text box &colored it red.

I'm not sure what you were trying to do with the \hline command.

Those equations don't make much sense.
 

Similar threads

Replies
15
Views
2K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 42 ·
2
Replies
42
Views
6K
  • · Replies 5 ·
Replies
5
Views
3K
Replies
1
Views
1K
  • · Replies 8 ·
Replies
8
Views
2K
  • · Replies 15 ·
Replies
15
Views
2K
  • · Replies 5 ·
Replies
5
Views
7K
  • · Replies 21 ·
Replies
21
Views
11K
Replies
2
Views
2K