How can we determine the rotational axis for a torques-related problem?

  • Thread starter Thread starter oontvoo
  • Start date Start date
Click For Summary
SUMMARY

The discussion focuses on determining the rotational axis for a torque-related problem, specifically analyzing how torques balance when the axis is at point A versus point O. Participants emphasize that the problem is conceptual rather than mathematical, as it involves understanding the balance of torques without specific numerical values. The key takeaway is that moving the rotational axis affects the torque magnitudes and directions, requiring careful consideration of distances from the axis.

PREREQUISITES
  • Understanding of torque and rotational equilibrium
  • Familiarity with the concept of rotational axes in physics
  • Knowledge of how to analyze forces and distances in torque calculations
  • Basic grasp of counterclockwise and clockwise torque effects
NEXT STEPS
  • Study the principles of torque and rotational dynamics in physics
  • Learn about the conditions for rotational equilibrium
  • Explore examples of torque calculations with varying rotational axes
  • Investigate the impact of distance on torque magnitude and direction
USEFUL FOR

Students studying physics, particularly those focusing on mechanics, as well as educators looking to enhance their teaching methods for torque-related concepts.

oontvoo
Messages
1
Reaction score
0

Homework Statement


(Please see attachment for the problem statement)
https://www.physicsforums.com/attachment.php?attachmentid=27212&stc=1&d=1280270933


The Attempt at a Solution


I do not see how we use the fact that the total torques balance when the rotational axis is through point A to find answer questions a) through d).
I mean, every variables are unknown...

So! ANyone got a hint?
 

Attachments

  • Capture.PNG
    Capture.PNG
    29.6 KB · Views: 668
Physics news on Phys.org
I feel that this is a conceptual rather than mathematical question, which is why no numbers or distances are given.

For example, if the torques are all balanced at O, that means the two torques which would tend to rotate it counterclockwise balance the single one that would rotate it clockwise (that's the one pointing down). Moving the axis to A means now you've got two torques which would rotate it clockwise, and one cc. And that one cc is a lot smaller, since lot weaker, since the distance between it and the axis has shortened.

Try to think about each scenario like that, reasoning carefully based on distances from axis and directions.
 

Similar threads

  • · Replies 5 ·
Replies
5
Views
3K
  • · Replies 8 ·
Replies
8
Views
2K
  • · Replies 4 ·
Replies
4
Views
1K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 9 ·
Replies
9
Views
2K
  • · Replies 1 ·
Replies
1
Views
2K
Replies
1
Views
3K
Replies
4
Views
2K
  • · Replies 17 ·
Replies
17
Views
1K
  • · Replies 5 ·
Replies
5
Views
6K