Uniform Motion and Non-uniform Motion

Uniform motion and non - uniform Motion are the important one in the newton's law of motion. This helps in understanding more on law of motions and its importance in our day today life.

The distances covered by car A and car B with respect to time is given below.

Car A

Time in Seconds	0	5	10	15	20	25	30	35
Distance covered in meters	0	10	20	30	40	50	60	70

Car B

Time in Seconds	0	5	10	15	20	25	30	35
Distance covered in meters	0	5	15	20	30	60	65	75

The car A travels equal distances in equal intervals of time whereas the car B does not cover equal distances in equal intervals of time. That is, motion of car A is an example of uniform motion whereas that of car B is that of non-uniform motion.

When a body covers equal distances in equal intervals of time then the body is said to describe uniform motion. When a body moves unequal distances in equal intervals of time or vice-versa, then the body is said to describe non-uniform motion.

This was the sample help to understand on Uniform Motion and Non - Uniform Motion. Hope you enjoyed reading this. I can still help you understand better on all topics on math help.

Three laws of Gravity

As we have discussed enough on newton's law of gravity.. let me also help you go through on the major three law of gravity.
what is the meaning of gravity?
When you throw a ball, book or a stone they will be pulled back to the ground. They experience a force to reach the ground. That force is called as "Gravity" or "Gravitation"
Three law of gravity -
As we already discussed that Newton stated three laws of gravity. These are also called as "Laws of Motion". The main concepts in the three laws of gravity are Velocity, Force, Mass and Acceleration.

1. First Law: The First law of gravity is also know as 'Law of Inertia'.It states that there is no change in a object unless and until some external force acting up on it. It also states that an object moves in a straight line until an additional force acts upon it.
2. Second Law: The acceleration of the object will be directly proportional to the net force applied on it and at the same time the acceleration of the object is inversely proportional to the mass of the object. Clearly, if we increase the force on an object the acceleration of that object also increases. At the same time if we increase the mass of the object the acceleration will decrease.
3. Third Law: This is also called as 'Law of Action-Reaction'. It states that there is always equal and opposite reaction for any actions

I hope my information would have helped you to understand on the law of gravity. I would also like to pass on one important message to you all. I had been go through TutorVista online eduction website .. they have the more specified and relevant content on all the subjects. If you need more help on any subject go on to the web site - www.tutorvista.com. This is one of the coolest web site which i have ever found and they do all wonders to help us in all subjects. If this is more interesting to you then share this information to others as well . keep reading .. if i make sense leave your comments.....

Effect of Gravity on Falling Objects

I have and important lesson to share with you all that is all about effects of gravity on falling objects.
Acceleration Due to Gravity of the Earth -
Gravity of the earth can be imagined to be a sphere made of a large number of concentric spherical shells with the smallest one at the center and the largest one at its surface. A point outside the earth is obviously outside all the shells. Thus, all the shells exert a gravitational force at the point outside just as if their masses are concentrated at their common center according to the result stated in the last section. The total mass of all the shells combined is just the mass of the earth. Hence, at a point outside the earth, the gravitational force is just as if its entire mass of the earth is concentrated at its center.
Gravitational Potential Energy -
The force of gravity is a conservative force and we can calculate the potential energy of a body arising out of this force, called the gravitational potential energy.
Weightlessness -
Weight of an object is the force with which the earth attracts it. We are conscious of our own weight when we stand on a surface, since the surface exerts a force opposite to our weight to keep us at rest.
Newton’s law of universal gravitation states that the gravitational force of attraction
between any two particles of masses m1 and m2 separated by a distance r has the magnitude
where G is the universal gravitational constant, which has the value 6.672 ×10–11 N m2 kg–2.
This was just and introduction to Effects of Gravity. Keep reading ... will discuss more on physics help may be in next lesson

MOTION AND FORCES

let me help you all about motion and forces and its factors. we were been learning all about newton's law of motion. Now i will also help you go through Motion and Forces.

Motion and Forces -

• Problems involving constant speed and average speed
• Newton's First Law of Motion
• Newton's Second Law of Motion
• Newton's Third Law of Motion
• Universal Law of Gravitation
• Effect of gravity on an object at the surface of the Earth
• Applying a force to an object perpendicular to the direction of its motion
• Circular motion
• Two-dimensional trajectory problems
• Two-dimensional vectors into their components and calculate the magnitude and direction of a vector from its components
• Two-dimensional problems involving balanced forces
• Problems in circular motion, using the formula for centripetal acceleration in the following form: a=v²/r
• Problems involving the forces between two electric charges at a distance (Coulomb's Law) or the forces between two masses at a distance (Universal gravitation)

With these... you might have come to an conclusion all about motion and forces. may be on the next lesson i will help you go through on Motion for a Body Moving under Gravity

Nuclear Energy and Chemical Energy

Nuclear energy is released when very small particles of matter split or combine. After the split or combination, they result in small particles or heavy particle. The rest of the mass is changed into energy. This process of changing mass into energy produces the energy.

Examples on nuclear energy and chemical energy-

Following are you the Examples on nuclear energy and chemical energy

Example :-

What is the function of control rods in a nuclear reactor? Explain, what is the material used for these rods?

Suggested Answer:-

Control rods regulate the rate of fission by absorbing the excess neutrons and prevent the chain reaction. Deeper the rods are placed slower the process.

The material used is boron or cadmium alloyed with aluminium or steel.

Let me also help you more on energy levels like work, energy and power . In the following lesson let me help you go through Environmental Laws. Keep reading and give your valuable suggestion and comments.

THE LAW OF CONSERVATION OF ENERGY

THE LAW OF CONSERVATION OF ENERGY -
Energy is an important one for us to live with. It not only increases out productivity power but also conservation of energy as well.
In the previous lesson we have discussed mechanical energy. We have seen that it can be classified into two distinct categories : one based on motion, namely kinetic energy; the other on configuration (position), namely potential energy. Energy comes in many a forms which transform into one another in ways which may not often be clear to us.

Law of Conservation of Energy Statement

The Law of Conservation of Energy states that "the total energy of an isolated system is conserved or said to be constant over time". It can also be said that "energy cannot be created or destroyed , but it can be transformed from one form to another form".

Following the major factor for conservation of Energy

• Heat
• Chemical Energy
• Electrical Energy
• The Equivalence of Mass and Energy
• Nuclear Energy

I hope that i have helped you on understanding all about conservation of energy. let me also help you go through about The Principle of Conservation of Energy in the following lesson. keep reading and keep in touch with your valuable comments.

Examples of Kinetic Energy

As we understood what is all about kinetic Energy in the previous lesson, let me also go through on Examples of kinetic Energy. This will help you not only on examples but also kinetic energy and temperature.
Kinetic energy:
Kinetic energy produced by a body due to its motion is called kinetic energy. The kinetic energy is equal to one half the product of mass and square of velocity of the body
Temperature:
One of the thermodynamic energy is temperature. It is related to average energy of motion
Examples of Kinetic Energy:

I would like to list down all the examples of Kinetic Energy. All moving objects have kinetic energy. Keeping this point in mind we can illustrate some examples of kinetic energy

1. A moving car
2. Water falling from a height in waterfalls
3. Electrons revolving around the nucleus
4. Earth orbiting the sun
5. A swinging pendulum
6. Satellites revolving around the planets
7. A walking man
8. A moving rocket or spacecraft
9. A bullet fired from a gun
10. A child playing a computer game
11. A spinning top
12. Water stored in the dam has potential energy.When it flows down the Potential energy gets converted into Kinetic energy.
13. A rocket fired from the launch vehicle.
14. A person skipping
15. A police running behind a thief
16. Mangoes falling from a mango tree
17. A diver undergoing sky diving
18. A person swimming
19. A crawling baby
20. A bucket of water undergoing vertical or horizontal motion

In short any example of motion you consider, it has kinetic energy associated with it.

I hope i took your time in a productive way. keep reading .... May in the next lesson let me help you understand on Momentum and kinetic energy.

What is Kinetic Energy

Introduction of Kinetic Energy -
Kinetic energy is a form of energy which is related to the motion of the particle.If a body is at rest then its kinetic energy will be zeroinetic energy is a form of energy which is related to the motion of the particle.If a body is at rest then its kinetic energy will be zero.

What is Kinetic energy:
I would also like to post an example on what is Kinetic Energy. Consider a body of mass 'm' moving with a velocity 'v'. The kinetic energy associated with the particle is given by
KE = 1/2mv^{2
Types of Kinetic Energy-}
Following are the types of Kinetic energies
1. Translational kinetic energy - possessed by a body undergoing straight line motion
2. Rotational kinetic energy - possessed by rotating objects
Have you come to an conclusion on what is all about Kinetic Energy. I would also like to share my thoughts with you on Examples of Kinetic Energy. Keep reading and leave your comments to help me help you better.........

Physics in relation to Science, Society and Technology

Physics is always in relation to People, Society and technology. The relation between physics, technology and society can be seen in many examples. The discipline of thermodynamics arose from the need to understand and improve the working of heat engines. The steam engine, as we know, is inseparable from the Industrial Revolution in England in the eighteenth century, which had great impact on the course of human civilization. Sometimes technology gives rise to new physics; at other times physics generates new technology. An example of the latter is the wireless communication technology that followed the discovery of the basic laws of electricity and magnetism in the nineteenth century. The applications of physics are not always easy to foresee.

Below are the few examples of some physicists from different countries of the world and their major contribution
Physics is the study of nature and natural phenomena. Physicists try to discover the rules
that are operating in nature, on the basis of observations, experimentation and analysis.
Physics deals with certain basic rules/laws governing the natural world. What is the nature of physical laws? We shall now discuss the nature of fundamental forces and the laws that
govern the diverse phenomena of the physical world.

Scope and Excitement of Physics

In this lesson lets try to learn more on what is all about Physics and its scope and excitement of Physics.

What is Physics?
The word Physics comes from a Greek word meaning nature. Its Sanskrit equivalent is Bhautiki that is used to refer to the study of the physical world. A precise definition of this discipline is neither possible nor necessary. We can broadly describe physics as a study of the basic laws of nature and their manifestation in different natural phenomena.

The scope of physics is described briefly in the next section. Here we remark on two principal thrusts in physics : unification and reduction.

Scope and Excitement of Physics.
We can get some idea of the scope of physics by looking at its various sub-disciplines. Basically,
there are two domains of interest : macroscopic and microscopic. The macroscopic domain
includes phenomena at the laboratory, terrestrial and astronomical scales. The microscopic domain includes atomic, molecular and nuclear phenomena*.
Physics is exciting in many ways. To some people the excitement comes from the elegance and
universality of its basic theories, from the fact that a few basic concepts and laws can explain
phenomena covering a large range of magnitude of physical quantities.

In the following lessons lets try to learn Physics in relation to Science, Society and technology.

Huygens Principle

In this lesson lets try to examine on Huygens Principle. Before we start lets try to know
" What is Huygens Principle?"
Huygens’ Principle (HP) contains both the principle of action-at-proximity and the superposition principle of waves . Although the propagation of sharp, non-spreading wave fronts is included in Huygens’ original formulation, it can be left out without touching those principles

We would first define a wavefront along with the wave theory : when we drop a small stone on a calmpool of water, waves spread out from the point of impact. Every point on
the surface starts oscillating with time.

If we have a point source emitting waves uniformly in all directions,
then the locus of points which have the same amplitude and vibrate in
the same phase are spheres and we have what is known as a spherical
wave as shown in Fig. At a large distance from the source, a small portion of the sphere can be considered as a plane and we have
what is known as a plane wave

Now, if we know the shape of the wavefront at t = 0, then Huygens
principle allows us to determine the shape of the wavefront at a later
time τ. Thus, Huygens principle is essentially a geometrical construction, which given the shape of the wavefront at any time allows us to determine the shape of the wavefront at a later time. Let us consider a diverging wave and let F1F2 represent a portion of the spherical wavefront at t = 0