Work and Energy (sec 2) Flashcards
K=.5mv^2
Kinetic Energy
U=mgh
Gravitational potential energy
Total Mechanical Energy=U+K
The total mechanical energy of an object is the amount of kinetic energy it has, and the amount of potential energy it has
0 = (the change in)E = (the change in)K + (the change in)U
A system with no nonconservative forces
W = F d
Work = force * distance
Joules
Isobaric
constant pressure system
(the change in) volume * Pressure = W
in an isobaric system
K(f)-K(i)=Net work
NET work, not work, NET work
Mechanical advantage F(out)/F(in)
Mechanical advantage is directly proportional to the amount of distance you move compared to the amount of distance the object you are trying to move moves.
Conservative forces
Do not dissipate the mechanical energy of a system (heat doesn’t happen basically)
Nonconservative forces
Dissipates the mechanical energy of a system (basically heat happens)
Power = Watt = joule/second = (N*meter)/second
Power is energy delivered per second
