Torque Sum with applied torque off axis

Thread starter Xevuhtess7
Start date Mar 19, 2013
Tags

Applied Axis Sum Torque

AI Thread Summary

When calculating the sum of torques in a free body diagram, an applied torque at a different point can still be considered. The torque generated by a couple, which consists of equal and opposite forces, remains consistent regardless of the pivot point chosen. Therefore, when summing torques about a specific point, the applied torque can be included as it contributes to the overall rotational effect. Understanding the relationship between torque and pivot points is crucial for accurate calculations. This concept is fundamental in mechanics and helps clarify the analysis of rotational systems.

Mar 19, 2013

Xevuhtess7

I think I'm missing something really simple here due to being out of school for a while:

In a free body diagram, if I am trying to take the sum of torques about point 1, how should I deal with an applied torque at point 2? See attached sketch

Physics news on Phys.org

Mar 19, 2013

tiny-tim

Science Advisor

Homework Helper

Welcome to PF!

Hi Xevuhtess7! Welcome to PF!

Do you mean a couple, a pair of equal and oposite forces?

The the torque is the same about any point.

Thread 'Is calling fictitious forces "not real" just about terminology?'

Hi there, im studying nanoscience at the university in Basel. Today I looked at the topic of intertial and non-inertial reference frames and the existence of fictitious forces. I understand that you call forces real in physics if they appear in interplay. Meaning that a force is real when there is the "actio" partner to the "reactio" partner. If this condition is not satisfied the force is not real. I also understand that if you specifically look at non-inertial reference frames you can...

View full post »

Thread 'Inclined treadmills and Galilean Invariance'

This has been discussed many times on PF, and will likely come up again, so the video might come handy. Previous threads: https://www.physicsforums.com/threads/is-a-treadmill-incline-just-a-marketing-gimmick.937725/ https://www.physicsforums.com/threads/work-done-running-on-an-inclined-treadmill.927825/ https://www.physicsforums.com/threads/how-do-we-calculate-the-energy-we-used-to-do-something.1052162/

View full post »

Thread 'Derivation of Hamilton's Principle: Questions'

I have recently been really interested in the derivation of Hamiltons Principle. On my research I found that with the term ##m \cdot \frac{d}{dt} (\frac{dr}{dt} \cdot \delta r) = 0## (1) one may derivate ##\delta \int (T - V) dt = 0## (2). The derivation itself I understood quiet good, but what I don't understand is where the equation (1) came from, because in my research it was just given and not derived from anywhere. Does anybody know where (1) comes from or why from it the...

View full post »