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define total energy
sum of energies in a system
what is kinetic energy and what affects it?
energy of motion affected by mass and velocity
define potential energy
stored energy of an object due to height or stretch/compression
what is the difference between gravitational and elastic potential energy
gravitational - due to height
elastic - due to stretch/compression
how does thermal energy affect motion of an object
disputes motion in form of friction
difference between energy transformations and transfers
transformations - within a system
transfers - between system and environment
describe basic energy model
energy cannot only be transferred or transformed not created or destroyed
define work
W = F*d
amount of energy transferred in/out of system
define law of conservation of energy
energy cannot be created or destroyed
Kf + Uf + ^ETH = Ki +Ui
what is an isolated system
^E=0 , energy does not transfer in or not
unit for energy and conversion
Joules , = Nm = 1kgm²/s²
rotational vs linear kinetic energy
rotational - motion of a rotating object
linear - straight line motion
conversations vs nonconservative forces
conservative - help store energy
non conservative - didn’t help store energy
define power
rate of work done on or by a system P = W/t
