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Unformatted text preview: Displaement Speed 3: Velacity
— Kinematics in One Dimension Kinematics in ﬁne Dimensiun
— Displacmem Speed 3: Velacity Outline Displacment Kinematics in ﬁne Dimensiun
— Displacment Speed 3: "I.I"eli::i:in.r Outline Displacment Speed 3; Velocity Kinematics in lIﬂinre Dimensiun
— Displacment Speed 3: Velccity Kinematics in One Dimension II Kinematics deals with the ccncepts that are needed tc
describe mcticn. In Dynamics deals with the effect that forces have an mcticn. Ir Together. kinematics and dynamics farm the branch of physics
kncwn as Mechanics. Kinematics in lIE'tne Dimensiun
— Displacment Speed 3: Velocity Displacement It in = initial position
II if = final position
In ; II ﬁi’ = i’ — iﬂ=displacement II Displacement: a vector that
points from an objects initial position to its final position and
has a magnitude that is the
shortest distance between the two positions. n DisIaeement = oi Kinematics in lCine Dimension
— Displecmen‘t Speed 3: Velﬂcity Displacement Initial peeitien Displacement ia=2.0m Ai=5.0m i = 7_0 In Final position h an? = i’ — iﬂ=?.0m  2.0m =5.Um Kinematics in Cine Dimeneien Dlsp Iacmen‘t Speed 3.: Ill..I"+alI:H:i1:'_nfr Displacement Initial pusitinn in = 7.0m Displacement Ai = —5.0 111 Final pusitiun i=2.0m II M = i‘ — 553:2.Dn1  ?.Drn =5.Um Kinematics in Cine Dimensiun Displacement Speed 3: Veleeity Displacement Initial poeiﬁen i0 = —2.0 III Ag = 7.0 III Displacement
4—. '—
Finel peeitien i = 50 III h i: ﬁi+in =?.Dn1  ?.Um =5.Dm Kinematics in lIﬂllne Dimeneien Dieplacment Speed 3: Velocity Displacement Ir Listed below are three pairs of initial and final positions that
lie along the x axis. Using the concept of displacement decide
which pairs give a positive displacement and which a negative
displacement. Explain. Initial position 1m Final position x
m m Wm
m..“ Kinematics in lIE'ine Dimension Disp lacrnent Speed EL Velmitv Speed 3; Velocity II Average speed is the distance traveled divided by the time
required to cover the distance. Distance Average Speed = m I! SI units for speed: meters per secend (m /s) Kinematics in lIﬂllne Dimensiun
— Disp Iacmen‘t Speed Fe "lil'ielInsanity:r Speed 3; Velocity II Hew far dees a jogger run in 1.5 hours (5 400 s) if his average
speed is 2.22 m/s? Distance = Average Speedx Elapsed Time = 2.22 m/sx5 400 s = 12 000 m. Kinematics in lIﬂllne Dimensien
— Disp lacrnent Speed EL Viability Speed 3; Velocity II Average velucity is the displacement traveled divided by the
time required to cover the distance. D'  t
Average Velocity = Isl) acemen Elapsed Time
{v}— “—1!” —E
_ t—tg _ m Kinematics in lIﬂlne Dimensiun Disp lacment Speed Er: Vﬂiﬂﬁity Speed 3; Velocity gu=Dl r=4.?‘ﬂl
———+ o
It And};r Green in the car ThrustSSC d)
Still Finish set a world record of 341.1 m/s in __ 1W _
ﬂ  +1609 111 Ir To establish such a record. the
. {I}
drnrer makes two runs through the
course. one in each direction, to I'll.5955 eUI nullify wind effects. a (I) I From the data. determine the ““5“ 5"” __
average velocity for each run.
ahlsusm {51' Kinematics in Cine Dimension Disp Iacment Speed EL Velﬂcity Speed 3; Velocity { "Em :~= ’2‘" — 1 509 ’" = +339.5m/s E _ 4.?40 s
{I}
t lulu
ﬁx _1 609 m I' 4.695: In
{:Vmﬂ }— E— m——342.? ”1/3 a
Finiii'l 5hr!
{31' Kinematics in Cine Dimensiun Disp Iacment Speed Fa: Velﬂcity Speed 3; Velocity gu=Dl_ r= JETID: F'il'lill’l vgm+ W '4: V533: 21' =
{I Vwier 3* = —V(:raen + Vwmd
{I Vwmd 21' = —1.5 m/s “.4595; Inn.0:
*5: Fame” 21' = 341.1 m/s
Finish Kinematics in Cine Dimensiun Disp lacrnEmt Speed Er: VEIﬂCity Instantaneous Velocity I The instantaneous velocity indicates how fast an object
moves and the direction of motion at each instant of time. I The instantaneous velocity is the slope of the line tangent to the 3:
vs. t curve. Ir This would be the green line. hr The blue lines show that as ﬁt
gets smaller. they approach the
green line. Kinematics in Cine Dimension ...
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 Fall '08
 BLOOMFIELD
 Physics

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