soal fisika dan jawaban kelas II

8/9/2019 soal fisika dan jawaban kelas II

1/13

No

.

Standart

Kompetensi

Kompeten

si Dasar

Materi Indikator

Soal

Soal Jawaban Panjang

1.

8. Momentum

Sudut dan

Keseimbanga

n Benda Tegar

8.7

Dinamika

Gerak

Rotasi

Kecepatan

gerak

menggelind

ing benda

pada bidang

miring

Siswa dapat

menentukan

kecepatan

gerak

menggelindi

ng benda

pada bidang

miring jika

diketaui !

" solid c#linder rolls $rom rest down te incline

is %& meters ig. Determine te speed o$ te

c#linder wen it arri'ed at te $oot o$ te

incline(.a. )8*)+ m,s)

b. )7*)8 m,s)

c. )+*)8 m,s)

d. )7*)+ m,s)

e. )%*)7 m,s)

Data - ! %& m g !& m,s)/ ),0 mR)

1roblem - 2b 3"nswer -4p" 5 4ktrans " 5 4krot " 4pB5 4ktrans B 5 4krot B

m g"51

2 m '")5

1

2 /

") m g B 5

1

2 m 'B)5

1

2 /

B)

m g"5 & 5 & & 51

2 m 'B)5

1

2 /

B

)

g" 5+210 'B

)

'B

60010

7

'B )+*)8 m,s)

6adi jawabann#a 9 'B )+*)8 m,s)

)+*)8 m,s)

'B )

2. 10. Fluida

Dinamis

10.9

Penerapa

n hukum

Bernoulli

Kecepata

n pada

tabung

venturi

Sisa

dapat

menentuk

an

kecepatan

pada

salah satu

pipa

tabung

venture.

Tis is in addition to te 'enture meter is

used to determine te $luid $low 'elocit#. /$

:& cm and a densit# o$ !&&& kg,m :

$luid* cross sectional areas "! 0 cm) and

") : cm). ;at is te 'elocit# o$ $luid

$low in cross section "(a. !*8: m,sb. ) m,s

Data - :& "! 0 cm) ") : cm).

1roblem - 2! 3

"nswer -

2! ") 2gh

A1A2

2

3

!*8


2/13

!ika

diketahui

luas area

"1# "2

dan

c. )*:< m,sd. :*!< m,se. 0*% m,s

: = !&>< 2103010

2

(5104)2(3104)2

: = !&>< 23

251089108

2!9)+ = !&>8=6

16108

2! 3,375 !*8: m,s

6adi jawabann#a "9 2! 3,375 !*8: m,s

$.11. %eori

Kinetik &as

11.'(nergi

Dalam

dan

Dera)at

Kebebasa

n

*ata+rataenerg,

kinetic

pada

benda

,ang

memiliki

$ gerak.

Sisa

dapat

menentukan rata+

rata

energ,

kinetic

pada

benda

,ang

memiliki $

gerak.

(ach molecule o- a particular

pol,atomic gas at 1#200 K has three

translational# three rotational# andvibrational degrees o- -reedom is -our

contributes to mechanical energ,. %he

average kinetic energ, per molecule

is.

a. /#/ 10+2$!b. /#9 10+20!c. /#$ 10+20!d. /#0 10+2

!e. /# 10+2$!

Data - T !)&& k K1,3810

23J

K $ !&

1roblem - 4K 3

"nswer -

Ek=f(12 k T)Ek=10( 12 )(1,381023

J

K) (1.200K)=8,3

6adi jawabann#a 9Ek 8,310

20J

Ek

8,3

. 11. %eori

Kinetik &as

11.

Kecepata

n e-ekti-

gas

Kecepata

n e-ekti-

gas

Sisa

dapat

menentuk

an

kecepatan

3alculate the e4ective speed o-

o,gen gas 56 7 $2 kg 8 kmol

situated in the container temperature

2: ; 3. 5K 7 1.$/ < 10+2$ ! 8 K

a. // m8s

Data = 6 7 $2 kg8kmol %7 2:o3 K7!.:8 ? !&>):

6 , K


3/13

e-ekti- gas)ika

diketahui

6 dan %.

b. /' m8sc. / m8sd. /$# m8se. /#9 m8s

1roblem -vRMS

"nswer -

m0=M

NA=

32 kg

kmol

6,021026molekul

kmol

5,311026

kg /molekul

vRMS=3kTm0 =

3(1,381023 JK)(300K)

(5,311026 kgmolekul )483,6m /s

Jadi jawabannya (D) 483,6m /s

'.11. %eori

Kinetik &as

11.1

%ingkat

Keadaan

gas

%ekanan

akhir gas

Sisa

dapat

mentukan

tekanan

akhir gas

)ika

diketahui

%1# P1# >

dan %2.

%he to liters o- gas at a temperature

o- 2: ; 3 and a pressure o- 1 atm is

compressed up to 1 liter at

atmospheric and heated up to the

temperature to 12: ; 3. %he ?nal

pressure o- the gas is

a. 2#/: atmb. 1 atmc. #2 atmd. $ atm

e. 2#: atm

Data - T! )7o 1 ! atm 2 )l T) !)7o

1roblem - 1) 3

"nswer -

P1

.V1

T1=

P2

.V2

T2

P2=

P1

V1

T2

V2 T1=

(1atm ) (2L) (400K)(1L) (300K)

=2,67 atm

Jadi jawabannya (E)

2,67atm

2,

11. %eori

Kinetik &as

11.'

(nergi

dalam

dan

Dera)at

(nergi

Kinetik

*ata+rata

Sisa

dapat

menentuk

an (nergi

kinetic

Determine te a'erage kinetic energ# and

energ# in 0 mol ideal gas at a temperature o$

!)7o i$ te gas is-a.gas monatomic@ b.gas diatomic k !.:8 =!& >

): 6 , K@NA %.&) =!&)%molecules , mol 9.

Data - n 0 mol@ T !)7o k !.:8 =!& >): 6 , K@NA %.&)

=!&)%molecules , mol

1roblem - a9 4K gas monoatomik

b9 4K gas diatomic

"nswer -

d9 ).olume

akhir gas

Sisa

dapatmenentuk

an volume

akhir gas

)ika

diketahui

,gen gas at a temperature o- 2: ; 3

has a volume o- 0 dm$ and apressure o- 1.01 < 10' @8m2. Ehat is

its volume hen the pressure is 1 raksa !:.%&& kg,m:

>raksa 7% cm &*7% m

1 E . g . !:.%&& ? +*8 ? &*7% !&!.)+)*8 C,m)

v=3P

v=3(101.292,8 Nm2 )

1,251kg

m3

v=492,8m /s

92#/

10 11. %eori

Kinetik &as

11.2

Persama

an

Gmum

%ekanan

gas

Sisa

dapat

menentuk

an

o man, moles o- gas pressure o-

10 ho are in a tank that has a

volume o- 100 liters# i- the

temperature is /: ; 3 and g 7 9./

Data-n !& mol2 !&& Fiter &*! m:

T 87A :%& K

2,96


6/13

%ingkat

Keadaan

&as

tekanan

gas )ika

diketahui

n# > dan %

m8s2Ca. )*7 atmb. )*+% atmc. ) atmd. !*%7 atm

e. :*: atm

1roblem - 1 . . . 3

"nswer -

PV= R T ! P= R T

V

P=(10) (8.314)(360)

0,1

P=299,304 C,m)

P= 299,304

13.600 (9,8) (0,76)

P=2,96atm

No. Standart

Kompetensi

Materi Indikator

Soal

Soal Jawaban Panjang Jawaban

Pendek

Aspek

Intelektual!. 8.7 Dinamika

Gerak Rotasi

Kecepatan

gerakmenggelind

ing benda

pada bidang

miring

Siswa dapat

menentukankecepatan

gerak

menggelindi

ng benda

pada bidang

miring

" solid c#linder rolls $rom restdown te incline is %& meters ig.

Determine te speed o$ te c#linder

wen it arri'ed at te $oot o$ te

incline(.

$. )8*)+ m,s)

g. )7*)8 m,s)

. )+*)8 m,s)

i. )7*)+ m,s)

j. )%*)7 m,s)

4p" 5 4ktrans " 5 4krot " 4pB5 4ktrans B 5 4krot B

m g"51

2 m '")5

1

2 /

") m g B

51

2 m 'B)5

1

2 /

B)

m g"5 & 5 & & 51

2 m 'B) 5

1

2 /

B)

g" 5+2

10 'B)

'B )+*)8 m,s)

9

:


7/13

'B 60010

7

'B )+*)8 m,s)

6adi jawabann#a 9 'B )+*)8 m,s)

)+*)8 m,s)

).

!&.+

1enerapan

ukum

Bernoulli

Kecepatan

pada tabung

'enturi

Siswa dapat

menentukan

kecepatan

pada sala

satu pipa

tabung'enture.

Tis is in addition to te 'enture

meter is used to determine te $luid

$low 'elocit#. /$ :& cm

and a densit# o$ !&&& kg,m: $luid*

cross sectional areas "! 0 cm)and

") : cm). ;at is te 'elocit# o$

$luid $low in cross section "(

$. !*8: m,sg. ) m,s. )*:< m,si. :*!< m,sj. 0*% m,s

2! ") 2gh

A1A2

: = !&>< 2103010

2

(5104)2(3104)2

: = !&>< 23

251089108

2!9)+ = !&>8=

6

16108

2! 3,375 !*8: m,s

6adi jawabann#a "9 2! 3,375 !*8: m,s

2!

3,375

!*8: m,s

"9

:

:. !!.0 4nergi

Dalam dan

Derajat

Kebebasan

Rata>rata

energ#

kinetic pada

benda #ang

memiliki :gerak.

Siswa dapat

menentukan

rata>rata

energ#

kinetic padabenda #ang

memiliki :

gerak.

4ac molecule o$ a particular

pol#atomic gas at !*)&& K as tree

translational* tree rotational* and

'ibrational degrees o$ $reedom is

$our contributes to mecanicalenerg#. Te a'erage kinetic energ#

per molecule is(.

$. 8*8 = !&>):6g. 8*+ = !&>)&6. 8*: = !&>)& 6i. 8*& = !&>)


8/13

j. 8*% = !&>):6


9/13

)& = !&>:I 2 !"#$2 N.m

7.Rotation

D#namics

Total

energ#

kinetic in

rolling

To anal#He

te total

energ#

kinetic o$

rolling object

" solid c#linder is rolling on a $lat

$loor wit 'elocit# !& m,s. Mass o$

te solid c#linder is < kg and te

diameter is 8& cm. Determine te

total kinetic energ# o$ te solid

c#linder -

". :&& 6B. :& 6. :&&& 6D. ::&& 64. : 6

Data - Solid c#linder

' !& m,s

m < kg

/ 1

2 mr)

d 8& cm r


10/13

B.R

#

.6R

#

D.#R

3

4.

4R

#

R

1

632 # R . R

R2

1

3# R

3R

#

+. Oluid Statics

Fiuid

le'er rise in

capillar#

To anal#He

te distance

o$ te center

o$ gra'it#Mercur# as a densit# o$ !:*%

g,cm:. "t te mercur# placed te

small tube wit diameter 0 mm. /t

turns out tat te mercur# in te

tube ) cm lower tan te mercur#

in te outer tube. /$ te contact

angle is !)7Q

* ow muc doessur$ace tension o$ mercur#3

". 0%*7 C,mB. 0*00% C,m. 0*%7 C,mD. 0*7% C,m4. 0*%& C,m

Data - Em !:*% g,cm: !:%&& kg,m:

d 0 mm 0=!&>:m r )*0=!& >:m ) cm )=!& >)m

!)7Q g !& m,s)

1roblem- 3

"nswer - 2&cos'

g"

)=!&>)

2 . &cos127

13600 .10.2,5x103

)=!&>). !:%&& . !& . )*0=!&>: 2 . &0,6

%*8 >!*) &

& 6,8

1,2

& & $()*+ N,m & ()*+ N,m

&

0*%7 C,m9

!&. Oluid Statics 1ascalUs

Faw

To anal#He

te

application

o$ 1ascalUs

law

" c#lindrical #draulic pump wit

eac diameter 8 cm and )& cm. /$

te small tube pressed wit $orce

0&& C* ten te $orce tat can be

produced b# te big tube is -

". :*!)0 CB. :!)0 C. :)!0 C

Data - d! 8 cm r < cm &*&< m

d) )& cm r !& cm &*! m

O! 0&& C

1roblem - O)3

"nswer -(1

A1 (2

A2

O) :!)0 CB9


11/13

D. :!)*0 C%. :)*!0 C

(1

# "2

(2

# "2

500

#0,042

(2

#0,12

500

0,0016 (2

0,01

&*&&!%O) 0

O)5

0,0016

O) '"2( N

!!.Oluid

D#namics

Te

principle o$

continuit#

To anal#He

te diameter

o$ pipe basic

on principle

o$ continuit#Te 'elocit# o$ water in a pipe wit

diameter % cm is &*)0 m,s. Tat te

water out wit speed < m,s* te pipemust be connected wit anoter

pipe* wic one end is a smaller

diameter. So* te diameter o$ tat

pipe is3

". !0 cmB. !0=!&>0cm. !0=!&>:cmD. !*0 cm4. !0& cm

Data - d! % cm %=!&>)m r :=!&>)m

'! &*)0 m,s ') < m,s

1roblem - d)3

"nswer - "!. '! "). ')

#

r!)

. '!

#

r))

. ')

# :=!&>)9). &*)0

# r) . : m

d & 2 ! +)(!"#$'

& #)#"( m & ")( -m

d !*0 cm

D9

!). Oluid

D#namics

Generator

e$icienc#

To calculate

a'erage

power in

application

o$ $luid

" water$all wit ig )& m is used

$or #dropower 1FT"9. 4'er#

second te water $lowing at !& m :.

/$ te generator e$$icienc# 00V and

acceleration o$ gra'it# g !& m,s)*

Data - )& m

E !&&& kg,m:

g !& m,s W 00V 2 !& m:

1listrik

!!&& k;

B9


12/13

d#namics

so te a'erage power tat can be

produced is - in k;9

". !!&B. !!&&. ))&&D. )0&&4. 00&&

1roblem - 1listrik3

"nswer - X V

t 10

1 !& m:,s

1 W E X g 00V !&&& !& !& )&

&*00 !&&& !& !& )&

!!&&&&& ;

Plistrik& ""## k

!:.Kinetic Gas

Teor#

"'erage o$

kinetic

energ#

To anal#He

te a'erage

o$ kinetic

energ#

/n a bo=* its contents &*0 m:. Tere

are !&0 gas particle. /$ te gas

pressure is ! atm* ow muc te

a'erage kinetic energ#3

". &*70 k6B. 70 6. 70&&& k6

D. 70& 64. &*70 6

Data - 2 &*0 m:

C !&0

1 ! atm !&0Cm)

1roblem - 4kY3

"nswer - 12 1

3 C m ')

&1

3 1

2 m ')C

12 2

3 4kC

4k3PV2N

310

50,5

2105

4k &*70 6

4k &*70 6

49

!


13/13

2x 10

6

33,24x 105

E &*% kg,m:

!0.Kinetic Gas

Teor#

/n energ# o$

ideal gas

To calculate

te in energ#

o$ ideal gasCeon Ce9 is monoatomic gas. ow

muc te in energ# o$ ) gram Ce

gas at temperature 0&Q i$ relati'e

molecular mass Mr !& kg,kmol3". 8&0)*< 6B. 8&*0)< 6. 8*&0)< 6D. 8&0)< 64. 8&0*)< 6

Data - m ) gram )=!&>:kg T 0&Q :):QK

Mr !& kg,kmol3

R 8*:! Z !&:6,kmol K1roblem - P3

"nswer - n

m

M"

2x103

10 )=!&>

soal fisika dan jawaban kelas II

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