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# Forms of energy

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by

## Jordan Williams

on 13 September 2013

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#### Transcript of Forms of energy

Forms of Energy
2 Kinds of Energy:
1. Kinetic
2. Potential
1
. Kinetic Energy (KE
): Energy that is in motion.
The amount of kinetic energy depends on an object's mass and its velocity.

Mechanical Energy
Potential Energy + Kinetic Energy= Mechanical Energy
Thermal Energy
Total energy of atoms in a substance or material... how fast the particles are moving... how hot an object is.
Conservation of Energy
This one is important!!
Energy= the ability to do work or cause change.
The more distance between 2 objects, the more potential energy they will have.
Potential Energy:
Energy that is stored and is ready to be used. It could POTENTIALLY be used.
Example:
when Katniss pulls her arrow back and holds it, she stores its energy. If she pulls it back 2 inches, there is not much energy stored, so when she lets go, it will not fly far. If she pulls the arrow back 8 inches, there is more energy being stored so when he lets go, the arrow will definitely fly further.
Video on KE & PE
Example: A bus that isn't moving has potential energy. It is also using some energy to sound, heat, and light. All of those energies added together create mechanical energy.
Think back to ICE CREAM LAB. Solids, liquids and gases have particles in motion (gases moving really fast, solids moving really slow).
Thermal energy is just a measurement of how fast those atoms are moving
. Really hot items have fast moving particles, so high amounts of thermal energy.
Electrical Energy
Energy from electric charges moving along a conductor. Electrons simply collide and give off energy because they are in motion.
Electromagnetic Energy
(Light Energy)
Light energy is produced in waves. It is just electrons bouncing together and produce energy, which comes in the forms of light.
Example: When you a flashlight is turned off, it has
POTENTIAL ENERGY
(there is energy, but it is stored and ready to use).
When you turn the flashlight on, the energy is simply converted to light energy.
Nuclear Energy
Nuclear energy is POTENTIAL ENERGY, so it is stored. This type of energy is stored in the
NUCLEUS of an atom
(why it is called nuclear). There is a HUGE amount of energy stored in a nucleus, which is why nuclear bombs and nuclear energy are so powerful.
Nuclear
Fission
vs. Nuclear
Fusion
Fission: One nucleus splits into 2 or more and gives off energy.
Fusion: 2 nuclei FUZE, or smash together to make 1 nucleus and give off energy.
The law states:
Energy can never be created or destroyed, it just gets converted to a different form of energy. So what happens something catches on fire- it isn't destroyed??
No, it isn't destroyed. The energy in a log just converts from potential energy to thermal (heat) energy, light energy, and chemical energy.
Needed Vocab:

Materialize
: to create or make
***On the back of your organizer, there is a blank space... write down how the song explains chemical energy and how it explains kinetic energy***
An object with a lot of
mass
has a lot of kinetic energy.

An object moving at a high
velocity
has more Kinetic energy.
Example: A rolling tennis ball has less
mass
than a rolling bowling ball so it won't have enough energy to transfer to the pin and knock it over.

If 2 bowling balls get rolled with the same mass, which ever one is traveling at a higher
velocity (speed
), will have more kinetic energy. This energy will then transfer to the pin and knock it over.
lots of distance between foot and ball= lots of potential energy to be used (kicks the ball far)
small distance between foot and ball= not much potential energy= (ball does not go far when kicked.)
Full transcript