Net Torque: Calculating Momentum & Time

AI Thread Summary
Net torque is defined as the change in angular momentum divided by time, similar to how net force relates to linear momentum. Angular momentum can be expressed as the product of angular velocity and moment of inertia, which depends on mass distribution. When net torque is applied to an object, it can result in either constant angular speed or angular acceleration, depending on the circumstances. The discussion clarifies the relationship between these concepts and corrects initial misconceptions. Understanding these principles is essential for analyzing rotational motion effectively.
corala
Messages
5
Reaction score
0
is there any formula of net torque? as we know, net force = momentum / time right? what about net torque?
 
Physics news on Phys.org
Net force is change in momentum divided by time. Net torque is change in angular momentum divided by time.
 
So, angular momentum = change in angular velocity x mass?

Please correct me if I'm wrong. Then, if net torque is applied, an object will experience a constant angular speed or an angular acceleration ?
 
Ok. I get it now. Thanks for your help. =)
 

Thread '1:1 versus 2:1 Mechanical Advantage debate'

The rope is tied into the person (the load of 200 pounds) and the rope goes up from the person to a fixed pulley and back down to his hands. He hauls the rope to suspend himself in the air. What is the mechanical advantage of the system? The person will indeed only have to lift half of his body weight (roughly 100 pounds) because he now lessened the load by that same amount. This APPEARS to be a 2:1 because he can hold himself with half the force, but my question is: is that mechanical...
View full post »

Thread 'Newton's first law?'

Some physics textbook writer told me that Newton's first law applies only on bodies that feel no interactions at all. He said that if a body is on rest or moves in constant velocity, there is no external force acting on it. But I have heard another form of the law that says the net force acting on a body must be zero. This means there is interactions involved after all. So which one is correct?
View full post »
Thread 'Beam on an inclined plane'

Thread 'Beam on an inclined plane'

Hello! I have a question regarding a beam on an inclined plane. I was considering a beam resting on two supports attached to an inclined plane. I was almost sure that the lower support must be more loaded. My imagination about this problem is shown in the picture below. Here is how I wrote the condition of equilibrium forces: $$ \begin{cases} F_{g\parallel}=F_{t1}+F_{t2}, \\ F_{g\perp}=F_{r1}+F_{r2} \end{cases}. $$ On the other hand...
View full post »

Similar threads

B Question about the definition of Torque Equilibrium
Replies
14
Views
726
I How is the net force on the system equal to 0 initially?
Replies
14
Views
1K
I Understanding Net Internal Torque and Kinetic Friction in a System
Replies
9
Views
2K
I Conservation of angular momentum during collisions
Replies
3
Views
3K
What makes a door move, the torque or the force or both?
2
Replies
52
Views
6K
Net External Torque: Definition & Understanding
Replies
2
Views
4K
I Moment of Inertia about an axis and Torque about a point
Replies
5
Views
3K
B Static friction needed for rolling without slipping
Replies
4
Views
2K
I Effects of External Torques on the Angular Momentum of Asymmetric Bodies
Replies
3
Views
1K
B The physics of flywheel launchers (like tennis ball shooters)
2
Replies
60
Views
4K

Hot Threads

Recent Insights

Back
Top