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[YMP/CM-08003] Coriolis Force --- Focault Pendulum

Node id: 6308page

The plane of oscillation of a simple pendulum is rotates due to Coriolis force. It is shown that the angular velocity of rotation is equal and opposite to the Earth's angular velocity. This result has the interpretation that the pendulum keeps oscillating in a fixed plane as seen from the frame fixed in stars. This is expected

kapoor's picture 24-06-19 17:06:27 n

[NOTES/CM-08009] Centrifugal force --- Effect of Earth's Rotation

Node id: 6222page

The effect of Coriolis force on the force acting on a body on the earth is computed at the poles, equator and at a general point. he banking of railway tracks and of roads is briefly discussed.

kapoor's picture 24-06-19 16:06:55 n

[LECS/CM-ALL] Classical Mechanics --- No Frills Lectures

Node id: 6267collection

About this collection:
This is a collection of Lecture Notes on Electromagnetic Theory.
An effort is made to keep the content focused on the main topics.
There is no discussion of related topics and no digression into unnecessary details.

Who may find it useful:
Any one who wants to learn, or refresh all topics, in standard one semester Classical Mechanics courses.

Topics covered:
The list of topics covered  appears in the main body of this page.
Click on any topic to see details and links to content pages.

 


This page is under construction


 

 

kapoor's picture 24-06-18 07:06:05 n

[NOTES/CM-07001] Small Oscilations in One Dimension

Node id: 6304page
kapoor's picture 24-06-18 07:06:20 n

[NOTES/CM-07002] Double Pendulum

Node id: 6305page
kapoor's picture 24-06-18 06:06:05 n

[NOTES/CM-08015] Rotations in Three Dimensions

Node id: 6301page

The set of all rotations that can be implemented physically  in three dimensions form a group. These most important and frequently used rotations are the rotations which can be implemented physically. These rotations, do not change the handedness of the coordinate axes and are called proper rotations. The improper  rotations take left handed systems to right handed systems, or vice  versa. The statement of  Euler's theorem about rotations is given.

kapoor's picture 24-06-18 05:06:55 n

[NOTES/CM-08013] Rotation of a Vector about \(X_3\)- Axis

Node id: 6230page

We derive the transformation rules for a rotation about \(X_3\)- axis.  The concept of active and passive rotations is briefly explained.

kapoor's picture 24-06-17 22:06:43 n

[NOTES/CM-08011] Rotations about a fixed axis

Node id: 6224page

Rotations about a fixed axis form a one parameter subgroup of  rotations.

kapoor's picture 24-06-17 22:06:47 n

[NOTES/CM-08006] Axis Angle Parametrization of Rotation Matrix

Node id: 6218page

A closed form expression for rotation matrix is derived for rotations about an axis by a specified angle \(\theta\).

\begin{equation}
R_{\hat{n}}(\theta)=\widehat {Id}-\sin (\theta) (\hat{n}\cdot \vec{I})+(1-\cos \theta)(\hat{n}\cdot\vec{I})^{2}
\end{equation}Here  \(\widehat{Id} \) is the identity matrix. and \(\vec{I}=(I_1,I_2,I_3)\) is given by 
\begin{equation} I_1=\left[\begin{array}{clc} 0 &0 &0\\ 0 &0 &-1\\ 0 &1 &0 \end{array}\right],I_2=\left[\begin{array}{clc} 0 &0 &1\\ 0 &0 &0\\ -1 &0 &0 \end{array}\right],I_3=\left[\begin{array}{clc} 0 &-1 &0\\ 1 &0 &-1\\ 0 &1 &0 \end{array}\right] \end{equation}. 

Also the components of the position vector a point transform a

\begin{equation} {\vec{x}}\Prime=(\hat{n}\cdot{\vec{x}})\hat{n}+\cos\theta\big(\vec{x}-(\vec{x}\cdot\vec{n})\hat{n}\big)-\sin\theta (\hat{n}\times \vec{x})\end{equation}

 

kapoor's picture 24-06-17 22:06:34 n

[NOTES/CM-08004] Equation of Motion in Non Inertial Frames

Node id: 6220page

 We derive an expression for Lagrangian for motion of a charged particle in a rotating frame, It is shown that the equation of motion can be written as

\begin{eqnarray} m\ddot{\vec{x}}=\vec{F_{e}}-2m\vec{\omega}\times{\dot{\vec{x}}}-m\vec{\omega} \times(\vec{\omega}\times\vec{x}) \end{eqnarray} where \(\vec {F}_e\) is the external force. As seen from the rotating frame, the particle moves as if it is under additional forces

  • $-2m\vec{\omega}\times{\dot{\vec{x}}}$ is called Coriolis force
  • $-m\vec{\omega}\times(\vec{\omega}\times\vec{x})$ is known as centrifugal force 

 

kapoor's picture 24-06-17 20:06:56 n

[NOTES/CM-08014] Active and Passive Rotations

Node id: 6229page

The active and passive view of rotations are defined and relationship between them is described.

 

kapoor's picture 24-06-17 19:06:18 n

[NOTES/CM-08001] The Group of Special Orthogonal Matrices in \(N\) Dimensions

Node id: 6232page

All  orthogonal  all \(N\times N\) orthogonal matrices  form a group called \(O(N)\). The set of all orthogonal  matrices with unit determinant  form a subgroup \(SO(N)\) . The group of all proper rotations coincides with \(SO(3)\).

kapoor's picture 24-06-16 15:06:35 n

[NOTES/CM-09010] A Heavy Top ---- Special Cases

Node id: 6240page

A heavy top is a rigid body  moving under influence of gravity with one of its points fixed. A brief description of four interesting cases of a heavy top is given.

kapoor's picture 24-06-15 13:06:30 n

[NOTES/CM-09011] General Displacement of a Rigid Body

Node id: 6241page

TO BE FINALIZED

kapoor's picture 24-06-15 12:06:35 n

[NOTES/CM-09009] General comments on Motion of a Rigid Body

Node id: 6239page

We discuss some general questions about, choice of frames of reference, generalized coordinates and constants of motion.

 

TO BE FINALIZED

kapoor's picture 24-06-15 11:06:28 n

[NOTES/CM-09012] Why Two Sets, Body and Space Sets, of Axes?

Node id: 6242page

The Newton's laws hold in an inertial  frame. However the equations of motion involve the moment of inertia tensor which in turn depends on the orientation of the body and varies with time. This make it solution to the motion of a rigid body  problem impossible. This difficulty is absent in the body fixed axes, the moment of inertia tensor depends only on the the geometry of the problem. So whether we use space axes ,or the body axes, depends on the problem to be solved, we use axes which makes the solution of the problem simpler.

kapoor's picture 24-06-15 11:06:41 n

[NOTES/CM-10009] Time Evolution as Canonical Transformation

Node id: 6255page

The time evolution governed by Hamilton's equations is an example of continuous canonical transformation. The infinitesimal generator of this transformation is the Hamiltonian itself.  

kapoor's picture 24-06-15 05:06:03 n

[NOTES/CM-10012] Continuous Symmetry Transformation

Node id: 6254page

In the phase space formulation, the constant of motion \(G\) given by Noether's theorem, expressed in terms of coordinates and momenta generates the infinitesimal symmetry transformation.

kapoor's picture 24-06-15 05:06:11 n

[NOTES/CM-10011] Infinitesimal Canonical Transformation

Node id: 6253page

The definition of infnitesimal transformations is given.

kapoor's picture 24-06-15 05:06:01 n

[NOTES/CM-10010] Group Structure of Canonical Transformations

Node id: 6252page

The set of all canonical transformations given by a generator of one of the four types form a group. 

kapoor's picture 24-06-15 05:06:04 n

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