Double blocks on a incline plane

Click For Summary

Homework Help Overview

The discussion revolves around analyzing the forces acting on a pulley in a system involving double blocks on an inclined plane. Participants are exploring the tension in the rope and its components, as well as the forces exerted by the blocks on the pulley.

Discussion Character

  • Exploratory, Assumption checking, Conceptual clarification

Approaches and Questions Raised

  • Participants discuss the need to decompose tension into horizontal and vertical components and question whether to consider the gravitational forces acting on the blocks. There is also inquiry about the total forces acting on the pulley and the role of the bracket that supports it.

Discussion Status

Several participants have provided insights into the forces acting on the pulley, with some suggesting that only the tension in the rope is relevant, while others highlight the importance of the reaction force from the bracket. The conversation indicates a productive exploration of the problem without reaching a definitive conclusion.

Contextual Notes

There are references to attachments that may contain additional information or diagrams relevant to the problem, but the specific details are not included in the discussion. Participants are also encouraged to clarify their statements and ensure they are addressing the problem accurately.

big_bounce
Messages
102
Reaction score
3

Homework Statement



See attachment (1)

what's forces act on pulley ?
Find direction and magnitude




Homework Equations


F=ma


The Attempt at a Solution


After we find tension in robe , See attachment (2)
what do we work ?
Must decomposes tension to horizontal and vertical vector and after that resultant of the two vectors ? or decomposes m1gsinθ and m2sinθ ?
See attachment (3) and then say is that Correct solution ؟
 

Attachments

  • 5643645.jpg
    5643645.jpg
    19.6 KB · Views: 506
  • 2.PNG
    2.PNG
    1.2 KB · Views: 537
  • t643543.jpg
    t643543.jpg
    24.9 KB · Views: 533
Physics news on Phys.org
All the pulley sees is the tension in the rope.
How many forces does the pulley see?
What is the magnitude of each of those forces?
Which direction does each force act?
What is the total applied force?
 
big_bounce said:

Homework Statement



See attachment (1)

what's forces act on pulley ?
Find direction and magnitude

Homework Equations


F=ma

The Attempt at a Solution


After we find tension in robe , See attachment (2)
what do we work ?
Must decomposes tension to horizontal and vertical vector and after that resultant of the two vectors ? or decomposes m1gsinθ and m2sinθ ?
See attachment (3) and then say is that Correct solution ؟
Please give a complete statement of the problem you're working on.

It seems that you are trying to do more than simply find the forces acting on the pulley.
 
you just add the two tensions vectorially and the answer u get is the correct answer... Tensions are the only forces acting on the pulley.m1gsin8 and m2gsin8 will act on the blocks, not on the pulley...
 
We want to calculate forces act on pulley .
So only tension's vectors act on pulley ?

See attachment
Is this correct answer ?
Resultant vector's magnitude and direction is correct ?


In this case F1=F2=T=28.94
 

Attachments

  • Untitled.jpg
    Untitled.jpg
    16 KB · Views: 485
Last edited:
The pulley is attached to the top of the triangular structure by bracket. This bracket exerts a reaction force upon the pulley.
 
lewando said:
The pulley is attached to the top of the triangular structure by bracket. This bracket exerts a reaction force upon the pulley.

And the reaction is equal to FR but in opposite direction , right ?

Please see Upper attachment
 
Last edited:
Right! Numerically, what did you get for the magnitude and direction of FR?
 
Last edited:

Similar threads

  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 11 ·
Replies
11
Views
2K
  • · Replies 16 ·
Replies
16
Views
5K
Replies
8
Views
2K
Replies
22
Views
1K
  • · Replies 11 ·
Replies
11
Views
3K
  • · Replies 5 ·
Replies
5
Views
3K
Replies
7
Views
2K
Replies
4
Views
2K