Classical mechanics formulations?

Khalid Mansour
Messages
1
Reaction score
0
Hi,
when do we use hamiltonian vs. Newtonian mechanics or even lagrangian formulations? pros and cons? I am thinking molecular dynamics codes
 
Physics news on Phys.org

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

Koopman–von Neumann mechanics references
Replies
5
Views
2K
I Is there a way in Lagrangian mechanics to incorporate the inertial response from initial momentum when using initial conditions instead of BCs?
Replies
9
Views
919
I Does Lagrangian Mechanics Handle Variable Mass System?
Replies
3
Views
1K
Energy formulation of classical mechanics?
Replies
1
Views
2K
Why do we need the Lagrangian formulation of Mechanics?
Replies
8
Views
2K
I Hamiltonian of the bead rotating on a horizontal stick
Replies
3
Views
2K
Does a statistical mechanics of classical fields exist?
Replies
2
Views
1K
I Variational Principles in Classical Mechanics (Douglas Cline)
Replies
2
Views
2K
Difference between Hamiltonian and Lagrangian Mechanics
Replies
20
Views
10K
Is there an English translation of Jacobi's work on mechanics?
Replies
3
Views
2K

Hot Threads

Recent Insights

Back
Top