Pendulum Using Lagrange And Hamilton

In summary, the conversation discusses a problem involving a pendulum with an accelerating support point. The participants suggest using polar coordinates and finding the kinetic and potential energies, taking into account the upward acceleration. They also mention finding the Lagrangian or Hamiltonian to determine the equations of motion. It is noted that the period of a pendulum is not simply 2pi(L/g)^1/2, but an approximation. They encourage considering the scenario where the upward acceleration is equal to g.
  • #1
skrao
1
0
i have been given a problem involving a pendulum, where its support point is accelerating vertically upward. The period of the pendulum is required. Anybody have any idea how to start this one? is it not just 2pi(L/g-a)^1/2?
 
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  • #2
First thing to do is write x, y and x', y' in terms of r and theta (polar coords). Draw a picture to help you visualize, then find the kinetic and potential energies and be sure to take into account the upwards acceleration, so you have both gravity and this upwards accelration acting on the mass. Then find the Lagrangian and/or Hamiltonian and use one of them to find the equations of motion.
 
  • #3
The period of a pendulum is not [tex] \nu = 2\pi \sqrt{\frac{L}{g}}[/tex] that is only an approximation to the right expression, which we can't solve exactly
 
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  • #4
skrao -- Ask yourself what the period would be if the upward acceleration was equal to g?

Regards,
reilly Atkinson
 

1. What is the Pendulum Using Lagrange and Hamilton?

The Pendulum Using Lagrange and Hamilton is a mathematical model that describes the motion of a pendulum using the principles of classical mechanics. It is based on the Lagrangian and Hamiltonian formalisms, which are powerful tools used in physics to analyze the dynamics of mechanical systems.

2. How does the Pendulum Using Lagrange and Hamilton work?

The Pendulum Using Lagrange and Hamilton works by using the Lagrangian and Hamiltonian equations to describe the motion of a pendulum. The Lagrangian is a function that takes into account the kinetic and potential energy of the pendulum, while the Hamiltonian is a function that represents the total energy of the system. By solving these equations, we can determine the position and velocity of the pendulum at any given time.

3. What are the advantages of using the Pendulum Using Lagrange and Hamilton?

One of the main advantages of using the Pendulum Using Lagrange and Hamilton is that it provides a more comprehensive and elegant approach to studying the dynamics of a pendulum. It allows for the inclusion of complex forces and constraints, and can be extended to more complicated systems. Additionally, it provides a deeper understanding of the underlying principles of the pendulum's motion.

4. Are there any limitations to the Pendulum Using Lagrange and Hamilton?

While the Pendulum Using Lagrange and Hamilton is a powerful tool, it does have some limitations. It is most effective for simple pendulum systems, and may become more complex and difficult to solve for more complicated systems. Additionally, it assumes ideal conditions and may not accurately represent real-world scenarios.

5. How is the Pendulum Using Lagrange and Hamilton used in real-world applications?

The Pendulum Using Lagrange and Hamilton has a wide range of applications in various fields, such as physics, engineering, and astronomy. It is used to study the motion of pendulums and oscillating systems, as well as to model and analyze the behavior of more complex systems. It is also used in the design and control of various mechanical systems, such as clocks, suspension bridges, and spacecrafts.

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