Work, Energy And Power Flashcards
Define Work
The product of the force and the distance moved by the force in the direction of the force
Define Power
The rate of doing work
Define Potential energy
The energy stored which is available to do work
Define Gravitational potential energy
The energy stored by a mass by virtue of its height in a gravitational field
Define Elastic potential energy
The energy possessed by a body by virtue of its deformation
Define Kinetic energy
The energy possessed by a body by virtue of its motion
Define Internal energy
The sum of a random distribution of the kinetic and potential energy associated with the molecules of the system
Define Efficiency
The ratio of the output power to the input power
Derive P=fv
P=W/t
W=Fxs
Derive Work done by resultant force= Ek
F=ma
v2= u2 +2as
Multiply by 1/2m
u=0
Derive Work done on gas
W= F s
P=F/A
A x s = V
Derive Ep=mgh
W= F s
F=Weight=mg
s=h
Derive Ek= 1/2m v2
v2= u2 + 2as
F=ma
u=0
W=F s
Work done against friction=…
Heat dissipated
Work done by driving force=….
Increase in internal energy and kinetic energy
In direction of gravitational field,
GPE…..
Ek…..
GPE decreases
Ek Increases
