hmm.....'energy' seems to be quite simple and easy....should be a piece of cake......
Although the word energy has its roots in ancient science, today it is used in many other disciplines as well.In the natural sciences, energy can be described as the capacity of a system to do work. In turn, is defined as the result of application of a force(gravitational, electromagnetic, etc) through a physical distance. Due to the existence of a variety of forces in nature, energy and work have many different forms (gravitational, electric, heat, etc.), most of which can be grouped into two major categories: kinetic energy and potential energy.
The kinetic energy of an object is the extra energy which it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its current velocity. Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes. Negative work of the same magnitude would be required to return the body to a state of rest from that velocity.
Potential energy is the energy that is by virtue of the relative positions (configurations) of the objects within a physical system. This form of energy has the potential to change the state of other objects around it, for example, the configuration or motion.
Various forms of energy can be grouped as potential energy. Each of these forms is associated with a particular kind of force acting in conjunction with some physical property of matter (such as mass, charge, elasticity, temperature etc). For example, gravitational potential energy is associated with the gravitational force acting on object's mass; elastic potential energy with the elastic force (ultimately electromagnetic force) acting on the elasticity of a deformed object; electrical potential energy with the coulombic force; strong nuclear force or weak nuclear force acting on the electric charge on the object; chemical potential energy, with the chemical potential of a particular atomic or molecular configuration acting on the atomic/molecular structure of the chemical substance that constitutes the object; thermal potential energy with the electromagnetic force in conjunction with the temperature of the object.
Gravitational potential energy is the potential energy that an object possesses by virtue of its mass and the gravitational force acting on it.
In everyday experience, gravitational potential energy arises most familiarly when an object is raised in the Earth's gravitational field. The object's increase in gravitational potential energy is equal to the amount of energy required to raise it, or, equivalently, the amount of energy that would be released if it were allowed to fall back to its original level.
Energy is a conserved quantity, meaning that it cannot be created or destroyed, but only converted from one form into another. Thus, the total energy of the universe always remains constant.Well I guess I would like to put some notes about energy we had learnt in science so my fellow school mates can even revise their notes when they are using the toilet..okay... well I supposed that was a long and mind-boggling post but it is actually quite alot of useful information...
the end..........
Although the word energy has its roots in ancient science, today it is used in many other disciplines as well.In the natural sciences, energy can be described as the capacity of a system to do work. In turn, is defined as the result of application of a force(gravitational, electromagnetic, etc) through a physical distance. Due to the existence of a variety of forces in nature, energy and work have many different forms (gravitational, electric, heat, etc.), most of which can be grouped into two major categories: kinetic energy and potential energy.
The kinetic energy of an object is the extra energy which it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its current velocity. Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes. Negative work of the same magnitude would be required to return the body to a state of rest from that velocity.
Potential energy is the energy that is by virtue of the relative positions (configurations) of the objects within a physical system. This form of energy has the potential to change the state of other objects around it, for example, the configuration or motion.
Various forms of energy can be grouped as potential energy. Each of these forms is associated with a particular kind of force acting in conjunction with some physical property of matter (such as mass, charge, elasticity, temperature etc). For example, gravitational potential energy is associated with the gravitational force acting on object's mass; elastic potential energy with the elastic force (ultimately electromagnetic force) acting on the elasticity of a deformed object; electrical potential energy with the coulombic force; strong nuclear force or weak nuclear force acting on the electric charge on the object; chemical potential energy, with the chemical potential of a particular atomic or molecular configuration acting on the atomic/molecular structure of the chemical substance that constitutes the object; thermal potential energy with the electromagnetic force in conjunction with the temperature of the object.
Gravitational potential energy is the potential energy that an object possesses by virtue of its mass and the gravitational force acting on it.
In everyday experience, gravitational potential energy arises most familiarly when an object is raised in the Earth's gravitational field. The object's increase in gravitational potential energy is equal to the amount of energy required to raise it, or, equivalently, the amount of energy that would be released if it were allowed to fall back to its original level.
Energy is a conserved quantity, meaning that it cannot be created or destroyed, but only converted from one form into another. Thus, the total energy of the universe always remains constant.Well I guess I would like to put some notes about energy we had learnt in science so my fellow school mates can even revise their notes when they are using the toilet..okay... well I supposed that was a long and mind-boggling post but it is actually quite alot of useful information...
the end..........
1 comment:
Wow! That was mind-boggling! So.... if you were going to put up some info for our fellow schoolmates in the girls' toilets, what exactly about "energy" would you most want to share?
Post a Comment