200 bài tập vật lý khó có đáp án

200 BÀI TẬP VẬT LÍ HÓC BÚA VỚI HƯỚNG DẪN VÀ LỜI GIẢI
(200 Puzzling Physics Problems with Hint and solution)
 
 !"!#
$% #&'()
*+ '()'(),
- .//.0.//1
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23456768696:1/15818788:1:8
23;4.9:5.56.16.666167696:6<9/96999:9<:/:.:6:7</571
5:65:15:85<65<1
=>?5758595:6.:5:9::5/<55/55555.558561
*@AB'C489595:6.755/9
'D'!E(./1718191:959.<6<15115<15<7
'CDF G6<1.7:8/85<1<7<8<9<:<<
H!4<5/5551.7.81611898:8<
'!I0>J'!K189:55//5/55/.5/65/15/75/85/:
'!=LM'!=$!N5<.9.:1<7/9/969197<5557516.//
"O'@PQ*M.<8.865.<56/56556.5165<<
*!R234./.556656756851751851951:
'!S,!56156956:51/515
PG7.767177785.75.85.95.:
H!2R15</<5<.55655155955:5.55..5.65.151<57/57557.577578579
5:65<.5<6
H!T:<55<5./57657159.5:8
>U2R...657:57<58/58558.58658158758<59/59.
2RT6/6558858958:59559659159759859959:59<5:/5:55:.5:15:75:8
5:9
DFVE*!J<65::5:<5</5<55<15<75<85<95<:
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

.//YZ[,D[\]'^_
Bài 1:'`)Wab(W)ac!d(3(aKE!8/('e(3
#f6!g!M!!O!=a!AhK!O!!O!!AhK!O
)!O)!AhK!O!=he(3ia3!jak7(0!f
i3!M!l!(I#j!Sa3K!NaN!amACO,!(=
)#JMnoaAp(M(IaaAB!am#f!fQ!qDm!AC
l!aApaq*m(IaAB!A(3!=aS(!l!fr)Usn!
aS(Q!(=#tq
Bài 2:P3F!LagE!!cW(ud(3)Mb(*`)vaw
a33M!Sam(3vN!d)M!vNx5(!c.,!
!@FM`)!sq
Bài 3:P3!K`!Sahia36(0W(QAh#Q*Ap#!K
(iABn(3j!!!y!aS(!H#MG!=_!
!!z!K!!AhMaih)pmFiUAh#M
{ .(0
){ 1(0
'!bFiUAh!A!g(4C
Bài 4:P3=(!(M(L(K(aABaQg
AhMP3at!()viMa`)vF
AB#Eh(3aCvFi|!jak{
W!t!(?Ub(WWM
l(Fi!iJ(;!L!=t!maS
u!t!Sa3m=(!(`(3aC
vMM(3aCv!i#ABq
Bài 5:iW!Sa}aK!Sa3!~W(3(Q!~=3
'!fa(3!?!WM)=O!Mx`!SQ!!A!j
`n!Q!E(3aS(|!j`!RAB)!Q)ie(3#f
Q!{*@(|16{0.•83Q!Haos'!f`!S!)S
(3!!G!Gb3Q!Oxrs!!jq
Bài 6:€)4•|&#‚({Q./z#W(3Ap

(L5/(P3M./(€)u•!C!A!cM
5/(!ƒas(Mr!;!RaABj#h!CaS
!i#E#;!=?!ƒ!J`aogWac!d)OApq
N!Xij!;!Rd!q
Bài 7:P3Fa3W)„(|(j!S!!TW
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.
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Bài 8:P3!i)@`!l!Ed(3!l!!`Jb(!~aOk(3aE
5/(W(QAhLnFiUAh!oN!!la3!L!
!AC!~aOd!i)@q'!!i#ABWd)@#M<//0(
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)!sabAh)W!dsaABaQ!C:(h(QaApq
$mn`!ak!!jm.)!AhdsaABaQ!C:(h
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Bài 11:P3!itaAB!u)g!)t#M()b!!=!!!A
(I)#Ma}!=aABaQW(3(Q!~!W6/a3h(Q!~
R!it`!SyWvNJ)b!A!mW(Q!~!WaAB!
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Bài 12:P3n)`!LaM!})vh!!AC!~aO#W(3(Q!~
!W`‰h(Q!~2f!m`!!y!aS(
#W#Wm@!=i3!mb!E(#M!MMaM!}M`
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Bài 13:P3!f`!L)v!iM(3x
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aABGiav!!NAh†n
at`€!cC•g(3atd)Rˆ$!
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at!E!A!Sa3|!u#u{d
6
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Bài 14: P3!msaEaABy!`!j)vakK!)W!A`!S
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!=!=P3!4!!!v!}si)WE!!msaE|aoaABygvN
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M#`vN!=!C
{ !)E!msaEr!Sa3!!AhMq
){ !!a3M)!)va3|)!M)!Ah{rn!e!K
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Bài 15:*m!R(Qp)v!!L#E!(3X
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Bài 16:*m!i#ABd(Ij(3aj#M!A!M!A!i#AB
(Qp$!!y!f#E)b!!Ta=‹(QpoN!!
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Bài 17:{DFi!L!=t!m=!(3FaS`g!M!(3R!M
!Sa3!n•aEUq
){'t!e(3@#ABaS!`(3R!#Wn•aE;#h=)!W
#t@#AB!`R!a`#Wn•aEsN!aE
{DFi)atd(3Mx†t`aS`!!LAp!=?da=
{*@#ABM#h!CfMx†!!L!R(Qp!!`aFh
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Bài 18:P3W#ƒaABGaQ!`#WaS!!LAp!=?da=
*!A!W#Rat(#EN!C(3!fhi#ABt!m(3(
!†!c`!@!Ea3(3!pG!ƒ†xaABDF
e(!†#fM#Mi!=#f=!#fW#ƒGT#Eha=
!!je`x!~!K!=lq
Bài 19:P3W)!u!SN!5(Ž6a!l(hF
i5(0(3)l!Na;at(F23
#ABd(Fr!A!mMm!i#ABWd
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Bài 20:P3!=!Ng!Ra3aAB)LM(3)l!h!Ra3|)at{W
!)l!#M5$!M!l=!Na`J)l!#h!C!5•!5•
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Bài 21:'!nt)bG#Mi!R!
P3nb(W(3)!aRU=(
!nU#EaABMBJ!aR

'=e(3#AB!R!!nt!ƒ
N!s(nMr`!Ra3!Cq
Bài 22:!4!|!j!J!W#V{_Mi!@!UE!
!nmav!mR()b!(Gim)`aRWt!M4!i
!=b(I!Ur#G(3)`5//‘Mr!aKiK!!d!aC
aR!W!aonmav!iG#M(@!!!tdai
!ACW_#G)`.//‘M#G)`7/‘4!M}rhil!E
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Bài 23:P3Gn`aR!mDaABihatZd
(3!3a!A!l!rDjmaABiMatZZ!c
D0.Š!a`mGnaABiMatZZjm
iatU#E!l`#E!cD3a!c}((3
(E!aR!ol(!m)v(E!a`
Bài 24:P3!eAhaABWJM(3aS(iav!*Apaw!e
!`aaA!A(3#G!W!e)v!dMAhO!mUcTa
!eM'!Œa3r!ak!A!SM!Ah!eEE!q
Bài 25:P3i!l!†!Aa;l`!i#AB5//)N!6/((M!M!
iM!jaS`4J(gWa5//(('t`Mi#ABAhat
amaJaSiaEE!J)b)Kq
Bài 26:P`faAB!w)v(3))b
a}!l!t`aApN!1/(aABaQM
(3!F!OAh!3M`kh
5/(!l(AhAhP3aS(W(R)aABu
#WW(3aE5/()b(3JsN!ao)3!Q
*Ah#R`!aABM)!jq
Bài 27:I!d!l!U)N!ga(3)l!
)ata;atAhaAB)vN)g(3n)`!i
#AB(M)N! |•{P;Ah)l!)J
paTT(M!`aEh(3v!
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.//YZ[,D[\]'^_
Bài 28:*!y))`sM!U!Oat!Na#C#ƒ!j!N'
M`!i#AB#h!C(M))`!!Ng`q
Bài 29:*AhN!Ah!M!d(3i(
?!~aOk#Wha3!O`)
i(?|{|){M|{aAB#M(Te
(3F#R(3atd(IaABaQM
(3aH#h!OatAh*Ah`M
atdi(?!jq
Bài 30:P3†tN!aR(=taRN!a3?aR!LdaR(jy!
)†a}J(23#hM!ACdTApJ)gUaRUMq
Bài 31:P3nt?aRaN!aRM)N!)m!WN!d`!
ak!!lh)Wa3!jak2RN!W)K(Qd`!Ea3!A!y
@J!aRTAp"`!Tnt`E!A!mMq
Bài 32:23(MApyc#†!mhKR!|E(33!a=!M{
W(Q@#M)!Wq
Bài 33P3W)!uagE
!!cWE!d(3)M5(
P3W)_!aABƒ†!An
#Gd(3#GaCM5(`aAB
!!jFiat!!R!i
#Gb(MaFh!A
!l!r$!i#ABd(IW)
aK)b!M!E(#MaM!}'
!Sa3d!caABN!!am

!`!E(a=#tatW
{ Mr!Sa3#J!Cq
){ MaaAB!#h!Cq
Bài 34: P3n#GaAByiav!Mat(3BJM7/(†(3#;
Mn#G!m`!Sa3!(3aApU!~aO)N!7/(hF
i!jak6(0Dra}!vE57’
Bài 35:
Bài 36:$(!fd(3a}!}d!M!MM=aj(pDM!paS(M
ƒaW(|5.paW({at(fd(!f!Sa3sat(fd(
p!!!=q
8
.//YZ[,D[\]'^_
Bài 37:P3!UaaABu(sWh`#h!=!!AC)b)!WaS
`asApu(!=q
Bài 38:P3!JJaApN!./(b(W(3!a}P3!J
!=#Ap(i!#W!JJol(Fi!i!S(M!J!=t
`|#;(jAp!jaS{
Bài 39:P3B`!~a3O!jakaQW(3)Mb(!“!at
B`aKaQW(3)4!uo!cbm!i#ABPd`!jn
#hh!i#AB(d(I)4!f`!S)b!!e(3#fh
FiM`)at!A!akvN!!(M!ja†y!j

Bài 40: P3UAh}(`(3)l!!!l!
)t!Lb(W(QAh(3)S!A
(!!E!l!rl!!`=!K
!y#I!L!J)iaK!ga`AhaAB
!!(4!AChe(3Fi
l!Ed€U(•AhaAB€!m#F•!A!mMTAhq
Bài 41:P3!E`!i#AB(N!(3aRN!”M!v!!Ag!i!Bd
Ap!=?MaRAp`Apa3!jak!!AC*`aAB

!`hFi(Q!~!~aOhaRApME`
)b•h!AC$!!#h!=y(M!Ea!!ACAh
!`!Sa3!!AC!q
Bài 42:P3!!`!i#AB(M!KM#!jakaABaQ!at#W!`
Ldj$!a`jaA!y`TTv!!Sa}!pMQ!E
aS(yd!!`ABW`M!Q`inl!j!
!;!R(3j)b)!Wm!Ri(!c#M–
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M!Ri(AB#M–
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b(M)M!jq*mi#ABWE!O@ŒV!lW#V!mt(3
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Bài 44: P3=((#E(LaAB)˜!(3aApb(
=(`aABaQW(3aH)N! iav!!~
aO!A!l!r't!`!Ri(!cyaHM=((
#E#h!A!mMaS=((#E!j)vAB!LaHq
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Bài 45:n)`aM!}!i#AB(5M(.aABaQ
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{Ma`!!!eCsi(Qa=Xi
(50(.#M)!WaSn)`!NWie!F
aAB!t@#AB#h!=qXiM)Jp!

)b)!WaSn)`W#W!K`!Sq
Bài 46:P3a}!C}(`)W)G!i#ABP–M(aAB!!f
Gsm!!O;a`MJ(!(3aAp!~DW)!i#ABP)vu
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)!i#AB(#Wama3#h!=q|Ln#E!E(!OE{
Bài 47:Eaji!R!S!AhK!N
!W(3aR(!Cb(!A!l!r
PIEajaAB!A!!=aS(!i#AB(
!u#E)g(3!!!j!i#AB!KM.#
at!f!jnPj!Sa3d
!nEaj!!f!E(aM!}S
šFiJ(!idE!A(3!M(d!p
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Bài 48:!i!L!“i!R!_MaAB;W(3!}a`
)@'!faABih!)b(3J!›aM!}Mœ.E!paS(•/
_a!cEs••/MEs•Š•/>!S†hFiD`!S
+av!vNMFid_ME!paS(
{•.0D ){•5//0D
Bài 49:"!(3UW)S!l!!y!FaAB(g)SatAh!p
5"a`UAhaABa`#E(g#I!Ahga)S!lAhf!m!p
.'!RlrsmUM#I!AhaK(gXi50.`!S
!m)SM!mM•†)bi5•6!f.•.!f
Bài 50:P3)l!!l!†!K!M)N!a;!=#L!m(.06)l!*`)v
#M(!nhFi`!jakžsn!†!~aOd`Ln
!RO@(QM!ol((3)S!O!Fi`#h!=d!Sa3
nŸaS!=#L!j)vM!L(u)l!
Bài 51:,aaOE(3aApaN!b(3!y!msaS@
iT!aOWamFi5//(0!ƒ†!ms#N!W#RM``!S@
iamFi.//(0!mƒ†!W(6s#N!W#R,ao!4aAB#Ma3

@!lc#Rh)l!!ACFi_!!m#M@#ABd!W#R!d
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