Energy Chapter 4 What is Energy? - the ability to do work or
cause change.
* When you do work on an object, some ofyour energy is transferred
to that object * When energy is transferred, the objectupon which
the work is done gains energy. Energy Contd... Unit for energy =
Joules Figure 1 pg 109
adfffdafasdf Types of Energy Kinetic: energy an object hasdue to
its motion Depends on: speed and mass *Faster an object moves =
morekinetic energy *More mass = more kineticenergy = 1 2 2 ~ Figure
2 pg. 110 Potential Energy: Energythat results from theposition or
shape of anobject *Energy that has thePOTENTIAL to do work Types of
Potential Energy
~Gravitational Potential Energy: potentialenergy related to height.
*GPE = Weight x Height ~ Elastic Potential Energy: potential
energydue to shape (compressed or stretched) Figure 3 and 4 pg
Forms of Energy Mechanical Energy energy associated withmotion,
position, or shape of an object Mechanical Energy = PE + KE Figure
1 pg 115 APPLY IT pg 116 Types of Energy associated with
Particles
Nuclear Energy Thermal Energy Electrical Energy Electromagnetic
Energy Chemical Energy Nuclear Energy Potential energy stored in
the nucleus of an atom
Nuclear fission nucleus splits Nuclear fusion nuclei of atoms fuse
or jointogether Figure 2 pg 117 Thermal Energy The total kinetic
and potential energy ofthe particles in an object. Higher the
temperature (movement of particles) =higher thermal energy
Electrical Energy Energy from Electric charges
Can be either potential or kinetic energydepending if charges are
in motion Electromagnetic Energy
Energy that travels through space inwaves Examples: microwaves,
X-rays, Infared(heat) waves, radio waves Chemical Energy Potential
energy stored in chemical bonds.
Chemical bonds hold atoms together When bonds break energy is
released Figure 3 pg Energy Transformation and Conservation
ALL FORMS OF ENERGY CAN BETRANSFORMED INTO OTHER FORMSOF ENERGY.
Energy transformation: a change form oneform of energy to another
Types of Transformation
Single: where one formtransforms into another formto get work done
Ex electrical to thermal(toaster) - Chemical to mechanical(body
breaking down food touse to move muscles) Multiple: series of
transformations happen inorder to do work. Ex: mechanical thermal
chemical thermal electromagnetic Strike a match fire heatcauses
bonds to break heat again see lightfrom flame Apply it - 121
chemical kinetic chemical Nuclear electromagnetic
thermal chemical electromagnetic Figure 1 and figure 2 pg. 122
Gravitational potential energy
The ball is covering more distance in equaltime intervals, o its
speed is increasing and therefore kinetic energy increases. Kinetic
Energy Figure 3 pg 123 Kinetic Energy Elastic Energy Kinetic
Energy
Gravitational potential energy Kinetic Energy Law of Conservation
of Charge
Law states that Energy can not be created ordestroyed. The amount
of energy is the same beforeand after transformation Pg
