newtonian mechanics

Addendum to Coriolis Force; Definition of Centripetal Force.

We need to understand first that Force can be categorized into two types. One is called tangential or collinear force. This component of the force is always along the direction of motion and changes speed of an object. It can change direction once the velocity of the object has become zero. Its NOT centripetal force. It can never make an object go in a plane or 3 D trajectory, as the motion is limited to only one dimension. The object can only go back and forth.

Now look at the other component. Its called a radial force. Its always perpendicular to the direction of motion. This force is called centripetal force, always. Note that its different from what we call central forces.

In consequence, both tangential and radial forces can be central.

Solutions to Irodov problems

Problems In General Physics, 
I.E. Irodov
Part-I Physical Fundamentals in Mechanics.

Chapter 1.1 Kinematics.  

10 interesting problems in elementary mechanics

This post intends to provide 40 interesting problems in elementary mechanics from IE Irodov, Problems in general physics that I solved in last couple weeks. Note that another 30 problems (additional 12 at hand) which has been solved will be uploaded after they are scanned, shortly.

Basic Concepts.
In this class today we will discuss the subject of “kinematics” briefly and solve some problems, based on the same. 

The motion of objects are studied under the heading “mechanics”.

♣ Mechanics is called “kinematics” if we study about the “nature of motion” without regard to what factors are causing such motion. 

♣ In addition to kinematics, when we focus our attention to study the factors that cause motion, such is named as dynamics. 

In kinematics today we will discuss a few problems that will cover the topics of …

The basics of Physics — is Gravity amenable to Quantization?

The basics of Physics — is Gravity amenable to Quantization?

This is a very detailed and long article, but written in a very simple language, as it seems to me, describing such concepts as; the basis of expectations of “Quantization of Gravity with other forces” which is colloquially known as Einstein’s dream of GUT — or, Grand Unified Theory, and whether such is possible or not and what we may be missing.

This article also describes briefly Pseudo Forces — check a detailed description here. (web-link)

In detail the basis of Physics Formalism — check a discourse here (web-link) and

What are waves and particle — (a link to an extensive discussion will be provided, upon further review), the discussion is in terms of a Formal POV of Physics — ‘slightly”, but much can be based and expanded on such.

This would be one of the most well written article by me as I would think.

So lets get back to the discussion of our original topic of interest.

The basics of Physics — is Gravity amenable to Quantization?

I like to speak first; about a development of Physics, in this article, that follows a chronological path, rather than, how we look at the cumulative understanding, in modern times, upon which we base our statements and help ourselves be inconsistent, because we forget or rather are oblivious; to the deeper framework, in which things were developed.

— Today I want to focus on Gravity. But before I talk about Gravity; I would like to speak something, on Physics itself.

Why is energy conserved?

Here is the way; that hasn’t been changed in a long time. We, start with a simple object, and we note that, such an object is defined for its motion by whats called, its location in space = x, or, the increments in its location, which is called, an infinitesimal distance = dx, the instantaneous time at which its motion is referred, t, or, the increments in its time, called dt.

Thats it. And, we would like to know; all that the object does in terms of x, t.

I would not like it, if my dear people sit in a car, and it vanished into thin air and never came back. I would like to keep track of it, the car, because I know my people would still be in it. I would like to, keep track of satellites, and, missiles and airplanes, I would like to know, whats happening around me, and why its happening.

It all started, with the quest, to solve for the trajectory, and then, became more complicated, as the complexity of these objects or systems grew. Collectively, they satisfy greatly, the quest we had set on, since the millennium and more, to understand, whats all, that goes on, in our universe, in our close vicinity, and in situations far off from us, as far as the extraneous bounds of the galaxy, in which we live, and more and more and more and deeper and deeper.

Then, x, t are not sufficient, to describe such situations. But, since its all systematic, we know all that has been defined, its not a party or Ramstein Music Band, where you forgot what happened yesterday. Its Hello Physics Inc. Pay Attention.

Now, as we defined dx and dt, we also note that, their ratio, or as-is-called, rate of x wrt t, called speed = v, is often formally written, as, x with a dot on it, … Its the first order time derivative of x = …

We also form, two quantities;

1. from v we form m.v = p = momenta, by multiplying the mass m into the velocity or speed v.

2. from a, we form in the same way, F = m.a = force.

But, force is also defined to be the time-rate of change of momentum p, or in other words, the ratio of the increments dp and dt, …

This latter is called Newton’s 2nd law; …

Its called a law, but strictly speaking, its a mathematical law so far, and not one which describes, universe’s phenomena so it cannot be called, a physical law or principle as of yet.

This point was originally raised by Feynman; as far as I know.