How do you determine 'r' in Torque calculations?

  • Thread starter Thread starter PhizKid
  • Start date Start date
  • Tags Tags
    Torque
Click For Summary
SUMMARY

The discussion focuses on determining the variable 'r' in torque calculations, specifically using the equation Torque = r * F * sin(x). A key point raised is that 'r' can be represented as L*cos(phi), where L is the length of the lever arm and phi is the angle between the lever arm and the direction of the force. The geometry involved in deriving this relationship is critical for understanding torque in physics.

PREREQUISITES
  • Understanding of basic trigonometry, including sine and cosine functions.
  • Familiarity with the concept of torque in physics.
  • Knowledge of vector components and angles in a right triangle.
  • Ability to interpret and analyze geometric relationships in physics problems.
NEXT STEPS
  • Study the derivation of torque equations in physics textbooks.
  • Learn about the application of trigonometric functions in physics problems.
  • Explore examples of torque calculations involving angles and lever arms.
  • Investigate the role of geometry in solving physics problems related to forces and moments.
USEFUL FOR

Students studying physics, particularly those focusing on mechanics and torque calculations, as well as educators looking for clear explanations of torque concepts.

PhizKid
Messages
477
Reaction score
2

Homework Statement


8GcR8.png



Homework Equations


Torque = r * F * sin(x)


The Attempt at a Solution


The solution says that the 'R' I marked was L*cos(phi). I fail to see the geometry of how they got this...you have only one side and one right angle for that triangle...how can you solve for 'R'?
 
Physics news on Phys.org
PhizKid said:
you have only one side and one right angle for that triangle...
You should be able to find the other angles, for example between the right hand rope and the bar.
 

Similar threads

  • · Replies 11 ·
Replies
11
Views
2K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 11 ·
Replies
11
Views
2K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 21 ·
Replies
21
Views
4K
Replies
3
Views
1K
Replies
2
Views
2K
  • · Replies 12 ·
Replies
12
Views
2K
  • · Replies 25 ·
Replies
25
Views
2K
  • · Replies 4 ·
Replies
4
Views
3K