#energy notes

-- kinetic energy formula: 1/2mv^2

-- kinetic energy requires motion

-- kinetic energy must be positive or zero; it cannot be negative

-- gravitational potential energy formula: mgh, where m = mass, g = gravity, and h = height

-- gravitational potential energy shows energy something could have

-- energy cannot be created or destroyed

-- the unit for energy is joules

-- energy can be classified as energy stores or energy transfers

Energy Stores -- kinetic energy -- gravitational potential energy -- chemical energy -- nuclear energy -- strain energy -- internal energy

Energy Transfers -- electrical energy -- thermal / heat energy -- light energy -- sound energy

.

-- energy can be converted from one form to another

-- in any energy conversion, the total amount of energy before the conversion is equal to the total amount after the conversion; this is the principal of conservation of energy

-- energy can be transferred by a variety of means

-- energy in conversions could appear in some amounts as unwanted energy, such as waste heat

-- G.P.E = gravitational potential energy

-- G.P.E formula = mgh

-- K.E. = kinetic energy

-- K.E. formula = 1/2mv^2