Ten Commandments of Dynamics
1
Ten Commandments of Dynamics I. F = m a . It just is. II. Thou shalt not introduce an angle without two vectors (or lines). III. Thou shalt not differentiate a vector without a reference frame. IV. Thou shalt only write ˙ θ k for simple angular velocity. V. Thou shalt not seek the angular velocity of a point or system. VI. Thou shalt not seek the velocity of a rotating body. VII. Thou shalt not differentiate a quantity that is valid for an instant. VIII. Thou shalt apply forces to points, not bodies. IX. Thou shalt not seek potential energy for all systems. X. Thou shalt not use T = Iα α α for 3D analysis.
-
Upload
christos-nik -
Category
Documents
-
view
14 -
download
1
description
Dynamics
Transcript of Ten Commandments of Dynamics
Ten
Com
mandm
ents
ofD
ynam
ics
I.F
=m
a.
Itju
stis
.
II.
Thou
shal
tnot
intr
oduce
anan
gle
wit
hou
ttw
ove
ctor
s(o
rlines
).
III.
Thou
shal
tnot
diff
eren
tiat
ea
vect
orw
ithou
ta
refe
rence
fram
e.
IV.
Thou
shal
ton
lyw
rite
θ̇k
forsim
ple
angu
lar
velo
city
.
V.
Thou
shal
tnot
seek
the
angu
lar
velo
city
ofa
poi
ntor
syst
em.
VI.
Thou
shal
tnot
seek
the
velo
city
ofa
rota
ting
bod
y.
VII
.T
hou
shal
tnot
diff
eren
tiat
ea
quan
tity
that
isva
lid
for
anin
stan
t.
VII
I.T
hou
shal
tap
ply
forc
esto
poi
nts,
not
bod
ies.
IX.
Thou
shal
tnot
seek
pot
enti
alen
ergy
for
allsy
stem
s.
X.
Thou
shal
tnot
use
T=
Iαααααααααα ααα
for
3Dan
alys
is.