What is Energy?
Energy is the ability to do work or make a change in the universe and work is simply a transfer of energy and is measure by the Joule which is measured by Newton*Meter.
There are two types of Energy:
Kinetic Energy- The energy of motion and is modeled by Ke = 1/2mv^2.
Potential Energy- Energy that is stored based on somethings position inside of a field. The three types of Potential Energy that we are using are Elastic Potential Energy (Us), Gravitational Potential Energy (Ug) and Internal Energy (Uint) which is the speed of how much the particles are moving within the object (isn't used as much).
Energy is the ability to do work or make a change in the universe and work is simply a transfer of energy and is measure by the Joule which is measured by Newton*Meter.
There are two types of Energy:
Kinetic Energy- The energy of motion and is modeled by Ke = 1/2mv^2.
Potential Energy- Energy that is stored based on somethings position inside of a field. The three types of Potential Energy that we are using are Elastic Potential Energy (Us), Gravitational Potential Energy (Ug) and Internal Energy (Uint) which is the speed of how much the particles are moving within the object (isn't used as much).
Gravitational Potential Energy (Ug) is based off of the height of the object within a gravitational field. The formula for Ug is Ug = mgh which is mass*height*gravity which on earth is 9.8. Therefore, the higher an object is up within the gravitational field then the more gravitational potential energy that object will have. If the object falls then all of the gravitational energy is changed into kinetic energy until it stops again.
Elastic Potential Energy (Us) is the energy that is stored by a stretched string and the formula for that is .Us = 1/2kx^2 where k is the spring constant and x is the displacement of the spring.
This video walks through how to solve a variety of Us problems and is important on some of the key concepts of this potential energy.
Energy is always conserved within the universe. You cannot destroy or create energy but energy can leave a system. When I drop a ball onto a pillow from a height of 5 meters the Ug is transferred into Kinetic Energy and the Ug is lost when it lands on the pillow and now has less Ug. This doesn't mean that the Energy is gone because it is at a lower height and is no longer moving. It's just been transferred out of the system and a good way of modeling this is by using something called a LOL chart.
LOL charts are charts that display the initial Energy in the form of a bar chart. Then in the middle is a circle displaying how the energy leaves the system through arrows that are labelled by the different types of work that can be done. These types of work are work done by Heat (Q), Radiation (R) and Working (W) (most common). Heat is the transfer of heat from hot to cold. Radiation is when matter loses energy to radiate light to something and Working is when their is an external push or pull that effects the system. Anyways, after that is shown within the LOL chart the second graph shows the final Energy. Under this is usually a Conservation of Energy Equation.
LOL charts are charts that display the initial Energy in the form of a bar chart. Then in the middle is a circle displaying how the energy leaves the system through arrows that are labelled by the different types of work that can be done. These types of work are work done by Heat (Q), Radiation (R) and Working (W) (most common). Heat is the transfer of heat from hot to cold. Radiation is when matter loses energy to radiate light to something and Working is when their is an external push or pull that effects the system. Anyways, after that is shown within the LOL chart the second graph shows the final Energy. Under this is usually a Conservation of Energy Equation.
https://bcphysics180.wordpress.com/tag/conservation-of-energy/
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