2 Work and Energy Flashcards
Energy
System’s ability to do work
Kinetic energy and formula
Energy of motion mv^2(1/2) V=speed not velocity
Energy is in Joules
Potential energy
Energy associated with object position. Potential to do work
Gravitational Potential Energy and formula
Depends on object’s position with respect to some level
U=mgh
Elastic potential energy formula
U=(1/2)kx^2
k= spring constant
x=magnitude of displacement
Conservative forces
Path independent and do not dissipate energy
Work of nonconservative forces formula
W=delta E= delta U + delta K
Work
Process by which energy is transferred from one system to another
Work displacement formula
W= Fd = Fd cos angle
F=magnitude of applied force
d= displacement througu which force is applied
Isobaric processes formula
W=P delta Volumen
Power and formula
Rate at which energy is transferred from one system to another
P=W/t=delta E/t
P in watts
Work energy theorem and formula
Net work done by forced acting on an object will result in an equal change in object’s kinetic energy
Wnet= delta K= Kfinal- Kinitial
Mechanical advantage and formula
Ratio of magnitudes of the force exerted on an object by a simple machine (Fout) to the force actually applied on the simple machine (Fin)
Fout/Fin
Load
Weight
Effort
Force required to lift crate
