reprot physics. momentum
Post on 19-Feb-2018
225 Views
Preview:
TRANSCRIPT
-
7/23/2019 Reprot Physics. Momentum
1/23
MOMENTUM & IMPULSE
2:30 4:00/ MW
Physics Lecture 1
Engr. Romeo G. Tgu!ino
-
7/23/2019 Reprot Physics. Momentum
2/23
The s"orts nnouncer sys# $Going into the
!!%str &re'# the (hicgo White )o* h+ethe momentum.$ The he,!ines ,ec!re
$(hicgo -u!!s Gining Momentum.$ The
cochpumps u" his tem t h!%time# sying
$ou h+e the momentum the critic! nee, istht you use tht momentum n, &ury them
in this thir, urter.$
M
M
E
T
M
-
7/23/2019 Reprot Physics. Momentum
3/23
Wht is Momentum5
Momentumis common!y use, term ins"orts. 6 tem tht hs the momentum is
onthe mo+e n, is going to t'e some eort
to sto". 6 tem tht hs !ot o momentum is
re!!y on the mo+e n, is going to &e hr, to
sto". Momentum is "hysics term it reers to
the untity o motion tht n o&7ect hs. 6
s"orts tem tht is on the mo+e hs themomentum. 8 n o&7ect is in motion 9on the
mo+e then it hs momentum.
M
M
E
T
M
-
7/23/2019 Reprot Physics. Momentum
4/23
Momentum is +ector untity tht is the
"ro,uct o the mss n, the +e!ocity o n
o&7ect or "rtic!e. The stn,r, unit omomentum mgnitu,e is the 'i!ogrm%meter
"er secon, 9'g ; m/s. 6!ternti+e!y# the grm%
centimeter "er secon, 9g ; cm/s cn &e use,
to e*"ress momentum mgnitu,e. The,irection o momentum +ector cn &e
e*"resse, in +rious
-
7/23/2019 Reprot Physics. Momentum
5/23
Momentum cn &e ,eine, s $mss in
motion.$ 6!! o&7ects h+e mss so i n o&7ect is
mo+ing# then it hs momentum % it hs its mssin motion. The mount o momentum tht n
o&7ect hs is ,e"en,ent u"on t
-
7/23/2019 Reprot Physics. Momentum
6/23
8n "hysics# the sym&o! or the untity
momentum is the !o
-
7/23/2019 Reprot Physics. Momentum
7/23
The units or momentum m/sis the stn,r, metric unit o momentum#
there re +riety o other units tht re
cce"t&!e 9though not con+ention! units o
momentum.Examples includes:
'g>mi/hr# 'g>'m/hr# n, g>cm/s.
8n ech o these e*m"!es# mss unit ismu!ti"!ie, &y +e!ocity unit to "ro+i,e
momentum unit. This is consistent
-
7/23/2019 Reprot Physics. Momentum
8/23
Momentum: ?ector @untity
Momentum is vecto !uantity. 6s ,iscusse, inn er!ier !esson# +ector untity is untity
tht is u!!y ,escri&e, &y &oth mgnitu,e n,
,irection. To u!!y ,escri&e the momentum o A%
'g &o
mgnitu,e n, the ,irection o the &o
is not enough to sy tht the &!! hs 10 'g>m/s o
momentum the momentum o the &!! is not u!!y,escri&e, unti! inormtion &out its ,irection is
gi+en. The ,irection o the momentum +ector is
the sme s the ,irection o the +e!ocity o the
&!!.
M
M
E
T
M
-
7/23/2019 Reprot Physics. Momentum
9/23
LetBs Prctice
1. 6 1200 'g cr ,ri+es
-
7/23/2019 Reprot Physics. Momentum
10/23
6ns
-
7/23/2019 Reprot Physics. Momentum
11/23
6ns
-
7/23/2019 Reprot Physics. Momentum
12/23
Wht is 8m"u!se5
The impulseo orce 9!so mesure, in/s is eu! to the chnge in momentum o
&o,y
-
7/23/2019 Reprot Physics. Momentum
13/23
LetBs Prctice
1. 6n o&7ect tr+e!s
-
7/23/2019 Reprot Physics. Momentum
14/23
6ns
-
7/23/2019 Reprot Physics. Momentum
15/23
vmFt =
IMPULSE CHANGE IN MOMENTUM
This theorem revealssome interestingrelationships such asthe INE!SErelationship "et#een$O!CE an% TIME
t
vmF
=
P
HY
SI
CS
8m"u!se Momentum
Re!tionshi"
-
7/23/2019 Reprot Physics. Momentum
16/23
VmfT =
Constant
Since TIME is %irectl&relate% to the ELOCIT'#hen the (orce an% massare constant) the LONGE!the cannon"all is in the
"arrel the greater thevelocit&*
Also) &ou coul% sa& that the(orce acts over a larger
%isplacement) thus there ismore +O!,* The #or- %one
P
HY
SI
CS
Impulse MomentumRelationship
-
7/23/2019 Reprot Physics. Momentum
17/23
These conce"ts re mere!y n outgro
-
7/23/2019 Reprot Physics. Momentum
18/23
8 &oth si,es o the &o+e eution re mu!ti"!ie, &y
the untity t# ne< eution resu!ts.
+ t = m ,v
This eution re"resents one o t
-
7/23/2019 Reprot Physics. Momentum
19/23
Re"resenting Re&oun,ing
(o!!isiono< consi,er co!!ision o tennis &!!
-
7/23/2019 Reprot Physics. Momentum
20/23
Drom the re"resenttion 9+ector ,igrm# +e!ocity%
time gr"h# n, tic'er t"e "ttern# in,icte
-
7/23/2019 Reprot Physics. Momentum
21/23
Answer6.The +e!ocity chnge is gretest in case . The
+e!ocity chnges rom K30 m/s to %2 m/s. This is chnge o A m/s 9% n, is greter thn in cse 6 9%
1A m/s.
-.The cce!ertion is gretest in case . 6cce!ertion
,e"en,s on +e!ocity chnge n, the +e!ocity chngeis gretest in cse - 9s stte, &o+e
(.The momentum chnge is gretest in case .
Momentum chnge ,e"en,s on +e!ocity chnge n,
the +e!ocity chnge is gretest in cse - 9s stte,&o+e.
J.The im"u!se is gretest in case . 8m"u!se eu!s
momentum chnge n, the momentum chnge is
gretest in cse - 9s stte, &o+e.
P
I
)8
()
-
7/23/2019 Reprot Physics. Momentum
22/23
Mem&ers
Jnie!!e ose"h I. -u&n(mi!!e . Rmos
ico!s Recto
erric 6. Ju!guimeJune Je Rm
Engr. Romeo G. Tgu!ino2:30 4:00/ MW
Physics Lecture 1
P
I
)8
()
-
7/23/2019 Reprot Physics. Momentum
23/23
)ources
htt"://!"s.s
top related