Undergrad Are Peak Moment and Peak Torque Equivalents in Biodex Dynamometry Measurements?

Click For Summary
Peak moment and peak torque in biodex dynamometry measurements refer to similar concepts but are used in different contexts. While engineers may refer to peak moment, physicists typically use the term peak torque, as torque specifically involves rotational force. Both terms can be expressed in Newton-meters (Nm), but they may not always represent the same physical quantity depending on the context of the measurement. Understanding the distinction is crucial for accurate interpretation of knee muscle strength outcomes. Clarifying terminology can help avoid confusion in reporting and analyzing dynamometry results.
teokevin11
Messages
1
Reaction score
0
TL;DR
Peak Moment vs. Peak Torque in Knee Extension
Apologies if this is in the wrong section as it isn't particularly medical in nature despite it being about the body.

I am currently conducting a rapid review with outcomes of knee muscle strength. This is measured by biodex dynamometry, which assesses numerous values including Peak moment (Nm). My issue is that another study has also used the same equipment but reported values of (Nm) as peak torque which makes sense as the movement in question is rotational (Think bent knee -> straight knee, the peak force produced by this movement). My question is whether these two values are the same but have been reported differently or if it is a completely different value with the same unit of measurement.

Thanks!
 
Physics news on Phys.org
Welcome to PF.
What an engineer calls a moment, a physicist calls a torque.
The least confusing term would probably be torque.
 
  • Like
Likes russ_watters and Dale
https://en.wikipedia.org/wiki/Moment_(physics) said:
In physics, a moment is an expression involving the product of a distance and physical quantity
So a moment can involve any physical quantity.
https://en.wikipedia.org/wiki/Torque said:
In physics and mechanics, torque is the rotational equivalent of linear force.
A torque is a moment that specifically involves a force.

And there is also a couple, which is a special case of a torque:
https://en.wikipedia.org/wiki/Couple_(mechanics) said:
In mechanics, a couple is a system of forces with a resultant (a.k.a.net or sum) moment but no resultant force.
So in the following figure, the top arrangement is a force producing a torque. But the bottom arrangement is a resultant force F (not producing a torque), and two forces C producing a couple. They both have the same effect on the system.

Force_and_couple.png
 
  • Like
Likes russ_watters
Have both values the same magnitude in Newtons-meter?
 
Thread 'What is the pressure of trapped air inside this tube?'
As you can see from the picture, i have an uneven U-shaped tube, sealed at the short end. I fill the tube with water and i seal it. So the short side is filled with water and the long side ends up containg water and trapped air. Now the tube is sealed on both sides and i turn it in such a way that the traped air moves at the short side. Are my claims about pressure in senarios A & B correct? What is the pressure for all points in senario C? (My question is basically coming from watching...

Similar threads

Replies
6
Views
2K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 1 ·
Replies
1
Views
2K
Replies
13
Views
3K
  • · Replies 14 ·
Replies
14
Views
4K
  • · Replies 3 ·
Replies
3
Views
3K
  • · Replies 1 ·
Replies
1
Views
4K
Replies
6
Views
2K
Replies
2
Views
3K
  • · Replies 6 ·
Replies
6
Views
7K