PHY 205 Lecture Notes - Lecture 8: Angular Acceleration, Mg 42, Circular Motion
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Circulagmotion
Motionofrigid bodies
break motion ofobjectintotwoparts
2atonement
ofb'Iffonmfaaskedlo center
of
mass
kinematics
Linearthin us Rotational Rotationaround 7axis
x0
Vide we do
dt It
aide teddy angular
dt acceleration
Non Uniform Circular Motion
at Art at vWR we 1
speed R
Ap air I
Rclockwise
counterclockwise t
bei 0dTogofromrotationaltolinear multiply
by R
insert carstartsfromrest wa545
Find tneeded tocomplete 100M
fax
a
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Problemttt CDRom starts from rest wx5rad Is 2
Find tittakesto complete ahullcircle
25Rad s
WiXt wo
Ge Ya xt2
te JE tFEE
Problemtt Find wafter 2turns
xzradpt starts from best
X3T
we 32racksfz Find T
Qiyaradlss t3
t320T 35805 23ms plugtinlow
Frady
w3grays GIFs2
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no
torque LFt rResponsible forrotational
accelekatron
product offorce perpendicular topivotpoint and
distance from pivotpoint
ETFr
Ft µFt Is in Q
IA
ppZirFsing
savectorz Productbtwvectors Dot
Product vs Cross
product
IFxTorque crossproduct
CrossCVectordproduct
aaIxvector wmagnitude absino anddirection In
plane
of Eand BtRighthandthforvector
sign
b
II absent
atb Ex 57 52 xd
abt
Ti si 6J EEixD
Izit 3J
I5µF 51 356521 635
txt JxExk to 00theyareparallel
ixj is ixjperpendicular
JXRq
KxTj
StaticProblemse
EE 0
Problem 1Whatis the
Tension stickbeing heldupbyastring
FIoEF to choose thepivot
point
20Et to
pIg
Document Summary
R bei 0 d speed v wr we 1. Togofromrotationaltolinear multiply by r insert carstartsfromrest w a 545. Cdrom starts from rest w ittakesto complete a hullcircle. Find w after 2 turns starts from best. Responsible for rotationalaccelekatron productofforce perpendiculartopivotpoint and distance from pivotpoint. Torque crossproduct vector w magnitude absino anddirection in planeof e and b trighthandthforvectorsign. I 5 f 51 3565 21 6 35 txt j x exk to 0 0 i x j is ixj. Thesystemwillstartsliding if o tanyams be fsmax msm ms. mg fs maytune ts fsmax myftantusmg tant 2 s. Ed mi ri f r2dm x dei p x. P oncethe cm passes theright sawhorse the plank rotates bicthe torque a fn nolonger cancels out ram. Il mi t pz_n i f po zardr h r2 znhpfp 3dr. Ili l l i l l i t be ra or r pluginp.
