Solving Tension in Massless, Frictionless Pulley System

  • Thread starter Thread starter jdroidxw
  • Start date Start date
  • Tags Tags
    Pulleys Tension
Click For Summary

Homework Help Overview

The discussion revolves around determining the tension in a massless, frictionless pulley system involving two masses, one of which is given in grams and the other in newtons. Participants are exploring the relationships between the forces acting on the system.

Discussion Character

  • Exploratory, Conceptual clarification, Problem interpretation

Approaches and Questions Raised

  • Participants discuss the conversion of mass to weight and the addition of forces. There is mention of drawing free-body diagrams to visualize the forces. Questions arise regarding the consistency of tension in the system and the interpretation of the diagrams.

Discussion Status

The discussion is active, with participants sharing their approaches and questioning each other's reasoning. Some guidance is provided through the suggestion of free-body diagrams, but there is no clear consensus on the interpretation of tension in the system.

Contextual Notes

There is a mention of potential confusion regarding the tension in different parts of the pulley system and the implications of the massless and frictionless conditions. The original poster's initial calculations are noted as incorrect, but the specific reasons for this are not resolved.

jdroidxw
Messages
9
Reaction score
0

Homework Statement


What is the tension T? The pulley is massless and frictionless.
m1=661 g, w2=5 N, g=9.8 m/s2
Picture attached



Homework Equations


T=w1+w2 ??


The Attempt at a Solution


First of all, I converted 661 g into kg. Next I multiplied that by g. I added that value to the 5N and I thought that was the T which was wrong.
 

Attachments

  • physics.png
    physics.png
    6.4 KB · Views: 570
Physics news on Phys.org
If you draw a free-body diagram you don't have to think as hard IMO. See the attached.
 

Attachments

  • free body018.jpg
    free body018.jpg
    11.1 KB · Views: 561
Where did you get the 2T' from?
 
I drew a free-body diagram for both masses. The tension T will not be the same as the tension in the other rope. Do the two free-body diagrams I drew make sense?
 

Similar threads

  • · Replies 12 ·
Replies
12
Views
2K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 18 ·
Replies
18
Views
2K
  • · Replies 10 ·
Replies
10
Views
5K
  • · Replies 15 ·
Replies
15
Views
7K
Replies
3
Views
2K
  • · Replies 22 ·
Replies
22
Views
2K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 18 ·
Replies
18
Views
5K