A bullet with mass 10 gram is fired and hits a block which mass is 1.49 kg. The block is haning freely on a piece of rope of length with 0.2 m. If the acceleration due to the earth gravity is 10m/s² and the rope is displaced by 60 cm measured from its initial position/vertical position, the velocity of the bullet when fired is ... m/s
1. A bullet with mass 10 gram is fired and hits a block which mass is 1.49 kg. The block is haning freely on a piece of rope of length with 0.2 m. If the acceleration due to the earth gravity is 10m/s² and the rope is displaced by 60 cm measured from its initial position/vertical position, the velocity of the bullet when fired is ... m/s
Hk Kekekalan Energi
(m+M).g.h = 1/2.(m+M).v'²
v' = √2gh
v' = √(2. 10. 0,6)
v' = 2√3 m/s
Hk Kekekalan Momentum
m.v + M.V = (m+M).v'
0,01. v + 1,49. 0 = (0,01+1,49). 2√3
0,01. v = 1,5. 2√3
v = 300√3 m/s
2. A 5g bullet moving at 100 m/s collides a wooden target, initially at rest. The mass of wooden target is 1kg. If after the collision the bullet is embed in the wooden block, what is the final speed of the wooden block?
This is innelastic collision. so we can use formula:
m1.v1+m2v2=(m1+m2)vf
5x100+1kgx0=(5+1000)vf
500+0=1005Vf
Vf=500/1005=0.49 m/s
3. if the speed of a 20 g bullet which is shot out of a gun is 200 m/s. what is the kinetic energy of the bullet?
Energi Kinetik
= 1/2 x m x v²
= 1/2 x 0,02kg x 200²
= 1/2 x 4 x 200
= 2 x 200 = 400 J
4. ) The workers___________ by the chemical company because they refused to work with certain dangerous chemicals. * A. was fired B. fired C. were fired D. is fired
Jawaban:
C. Were fired.
Penjelasan:
Karena "the workers" adalah bentuk plural (jamak) yang dimana berpasangan dengan "were" (bentuk lampau dari "are"). Sementara itu, "fired" adalah bentuk lampau dari "fire" yang merupakan verb bermakna "memecat".
Semoga membantu!
5. 1.Make this sentence into passive form: "Mr President will open the meeting." *a.The meeting will be opened by Mr President.b.The meeting is will opened by Mr President.c.The meeting will is opened by Mr President.d.The meting is opened by Mr President.2.This is a required questionMake this sentence into passive form: "The police is firing at the terrorists." *a. The terrorists are being fired by the police.b. The terrorists is being fired by the police.c. The terrorists was being fired by the policed. The terrorists were being fired by the police.
Jawaban:
1. A. The meeting will be opened by Mr President
2. A. The terrorists are being fired by the police
Jawaban:
1.d the meting is opened by Mr.president
2.b
6. A wagon with 15 kg of mass moves at velocity of 0,25 m/s toward a concreate wall. At the same time, a bullet 10 g mass is fired at velocity 1.000 m/s toward the wall. Calculate: a. The momentum of the wagon b. The momentum of the bullet
mass wagon = 15 kg
v wagon = 0,25 m/s
mass bullet = 0,01 kg
v bullet = 1000 m/s
a. P wagon = mass wagon * v wagon
= 15 kg * 0,25 m/s
= 3,75 kg*m/s
b. P bullet = mass bullet * v bullet
= 0,01 kg * 1000 m/s
= 10 kg*m/s
Correctmeifiwrong
7. The worker is afraid.. A.that will he get fired B.that he will get fired
Jawaban:
B
Penjelasan:
Will + Subject digunakan untuk pertanyaan
Jawaban:
b.that he will get fired
the worker is afraid that he will get fired
pekerja takut jika dia akan terbakar
dan will+subject digunakan dalam kalimat pertanyaan
8. answer the question below number one is an example! 8:00 p.m.=
eight o'clock p.m
begitukah?
9. A bullet of mass 0.20 kg travels horizontally at a speed of 400 m/s. it strikes a stationary wooden block of mass 1.80 kg resting on a frictionless, horizontal surface. the bullet stays in the block. what is the speed of the bullet and the block immediately after the impact? 200 m/s 80 m/s 44 m/s 40 m/s (in ulanganku hari ini)
Jawaban:
40 m/s
Penjelasan:
Known :
Mb = 0.20 kg
Vb = 400 m/s
Mw = 1.8 kg
Vw = 0 m/s (Resting)
Solution :
Because bullet stays in the block, then the speed of the bullet and the block will be same :
Mb . Vb + Mw . Vw = (Mb + Mw) . V
0.2 . 400 + 0 = (0.2 + 1.8) . V
V = 40 m/s
10. The workers___________ by the chemical company because they refused to work with certain dangerous chemicals. * A. was fired B. fired C. were fired D. is fired
Jawaban:
C. were fired
Penjelasan:
Goodluck ╰（￣▽￣）╭
Jawaban:
jawabany c. were fired
11. a bullet of mass 200 gram is fired at elevation angle of 30° and with initial velocity of 10 m/s. if the earth gravitational acceleration 10 m/s², the potential energy of the bullet at its highest point is...(sekalian cantumin arti soalnya ya,biar yang lain juga maksud:) )TERIMAKASIH UNTUK PENJAWAB^^
Sebuah peluru bermassa 200 gram dilemparkan dengan kecepatan 10 m/s pada sudut 30° dengan horizontalnya. Jika percepatan gravitasi 10 m/s² , energi potensial pada titik tertinggi adalah 2,5 Joule
PEMBAHASANBerat sebuah benda adalah gaya tarik gravitasi yang dialami oleh benda tersebut . Berat sebuah benda ini di pengaruhi oleh percepatan gravitasi yang dialami olehnya yang di rumuskan dengan :
W = m x g
dimana :
W = berat benda ( N )
m = massa benda ( kg )
g = percepatan gravitasi ( m/s² )
Gaya adalah tarikan atau dorongan. Gaya termasuk besaran vektor karena memiliki besar dan arah. Satuan Gaya adalah Newton ( N ).
Beberapa gaya dapat bekerja pada benda yang sama dan menghasilkan gabungan gaya atau lebih di kenal dengan istilah resultan gaya. Secara sederhana gaya yang searah akan menghasilkan total gaya yang semakin besar , sebaliknya gaya yang saling berlawanan arah akan menghasilkan total gaya yang semakin kecil.
Hukum yang terkenal mengenai gaya ini adalah hukum Newton tentang gerak.
Hukum ke-1 Newton menyatakan bahwa:
Jikalau resultan gaya yang bekerja pada benda adalah 0 N maka benda akan bergerak dengan kecepatan tetap atau benda akan diam
Hukum ke-2 Newton menyatakan bahwa :
∑F = m . a
dimana :
∑F = Resultan Gaya pada benda ( N )
m = massa benda ( kg )
a = percepatan benda ( m/s² )
Hukum ke-3 Newton menyatakan bahwa :
F aksi = - F reaksi
dimana :
F aksi = Gaya aksi benda 1 ke benda 2
F reaksi = Gaya reaksi benda 2 ke benda 1
Gerak lurus dapat di bedakan menjadi dua macam yakni:
Gerak Lurus Beraturan (GLB)Gerak ini terjadi saat benda bergerak lurus dengan kecepatan tetap. Rumus untuk gerak ini adalah :
v = s / t
dimana :
v = kecepatan benda ( m/s )
s = jarak tempuh benda ( m )
t = waktu tempuh ( s )
Gerak Lurus Berubah Beraturan (GLBB)Gerak ini terjadi saat benda bergerak lurus dengan kecepatan yang senantiasa berubah secara teratur. Dengan kata lain benda bergerak dengan percepatan tetap. Rumus untuk gerak ini adalah :
a = ( Vt - Vo ) / t
s = ( Vt + Vo ) . t / 2
s = Vo. t + (1/2) a . t²
( Vt )² = ( Vo )² + 2.a.s
dimana :
a = percepatan benda ( m/s² )
Vt = kecepatan akhir benda ( m/s )
Vo = kecepatan awal benda ( m/s )
t = waktu tempuh benda ( m/s )
s = jarak tempuh benda ( m )
Gerak parabola adalah gabungan antara gerak lurus beraturan (GLB) dan gerak lurus berubah beraturan (GLBB). Kita bisa meninjaunya secara terpisah yakni secara vertikal adalah GLBB karena ada percepatan gravitasi, dan secara horizontal adalah GLB karena tidak ada percepatan alias benda bergerak dengan kecepatan konstan.
Jangkauan maksimum (R) dan tinggi maksimum (H) yang bisa di capai benda :
R = vo² . sin 2Ф / g
H = vo² . sin² Ф / (2g)
dimana :
R = jangkauan maksimum ( m )
H = tinggi maksimum ( m )
vo = kecepatan awal ( m/s )
Ф = sudut elevasi ( derajat )
g = percepatan gravitasi ( m/s² )
Okay marilah kita gunakan prinsip ini untuk menyelesaikan soal yang di maksud.
Diketahui :
m = 200 gram = 0,2 kg
vo = 10 m/s
Ф = 30°
g = 10 m/s²
Ditanyakan :
Ep = ?
Penyelesaian :
H = vo² . sin² Ф / (2g)
H = 10² . sin² 30° / (2 . 10 )
H = 1,25 m
Ep = m . g . h
Ep = 0,2 x 10 x 1,25
Ep = 2,5 Joule
Pelajari lebih lanjut :[tex]\textbf{Percepatan}[/tex] : https://brainly.co.id/tugas/18400185
[tex]\textbf{Daya Gerak}[/tex] : https://brainly.co.id/tugas/17121561
---------------------------
Detil Jawaban :[tex]\textbf{Kelas:}[/tex] 8
[tex]\textbf{Mapel:}[/tex] Fisika
[tex]\textbf{Bab:}[/tex] Gerak
[tex]\textbf{Kode:}[/tex] 8.6.1
[tex]\textbf{Kata Kunci:}[/tex] Gaya, Gerak, Jarak, Percepatan
12. The bullet is fired upwards at an initial speed of vo m/s. The height of the floor after t seconds is expressed by the function h(t) = 100 + 40t – 4t2. The maximum height that the ball can reach is...~-~nt: next time Mashi. Charissa is busy
the answer is...
100 m
why 100m?
.......
°"The bullet is fired upwards at an initial speed of vo m/s."
°"The height of the floor after t seconds is expressed by the function h(t) = 100 + 40t – 4t2."
asked???
The maximum height the ball can reach?
the answer is 100m.
hope it's useful ^^
13. A ball is fired vertically upwards with a velocity v. It reaches a height h. The same ball is now fired with 2v, new h?
Jawaban:
ufdidgwjevaacacnzmzkddkkddpfkghfidkdfk39
Jawaban:
Air resistance can be ignored.
What is the new height reached by the ball?
4h
Pembahasan
14. 35 g, 250g, 1kg Berapakah massa benda tersebut
Jawaban:
35 g + 250 g + 1 kg = 1285 g / 1,285 kg
Penjelasan:
35 g + 250 g + 1 kg
35 g + 250 g + 1000 g
= 1285 g / 1,285 kg
15. If h= 5 cm after bullet pierces inside the block are 50 g and 4.95 kg respectively. If the acceleration due to gravity 10 m/s2 , the velocity of bullet before collision.....M/s
Pembahasan
Diketahui :
h = 5 cm = 0,05 mmp = 50 g = 0,05 Kgmb = 4.95 kgg = 10m/s^2Ditanya :
VpDijawab :
1. cari terlebih dahulu kecepatan setelah tumbukan dengan menggunakan ketinggian balok.
2. cari kecepatan peluru.
dalam lampiran ✅
16. 250g+12hg=.............g di jawabya
250 g + 12 hg = g
= 250 g + 12(100)g
= 250 g + 1.200 g
= (250 + 1.200)g
= 1.450 g
Jawaban:
Setiap turun satu tingkat dikalikan 10. Setiap naik satu tingkat dibagi 10.
1 hg=100 g
Diperoleh hasil penjumlahan berikut.
=250 g+12 hg
=250 g+(12×100) g
=250 g+1.200 g
=1.450 g
Nilai dari 250 g+12 hg=1.450 g
Penjelasan dengan langkah-langkah:
Semoga membantu jadikan jawaban terbaik ya (｡♡‿♡｡)
17. 1000dg+250g=..............g
1000dg+250g=...g
100g+250g=...g
hasilnya 350 g
Semoga bermanfaat1000 dg =100 g +250 g= 350 g
18. 1.Make this sentence into passive form: "Mr President will open the meeting." *a.The meeting will be opened by Mr President.b.The meeting is will opened by Mr President.c.The meeting will is opened by Mr President.d.The meting is opened by Mr President.2.This is a required questionMake this sentence into passive form: "The police is firing at the terrorists." *a. The terrorists are being fired by the police.b. The terrorists is being fired by the police.c. The terrorists was being fired by the policed. The terrorists were being fired by the police.
Jawaban:
1. A
2. A
Penjelasan:
karena itulah jawaban yang paling benar
semoga membantu:)
Jawaban:
1.A
2.A
maaf kalo salah
maaf ya
19. kinetic energy possessed by a 25g bullet is 2000J. The velocity of the bullet is?
Jawaban:
282,84 m/s
Penjelasan dengan langkah-langkah:
[tex]ke = m {v}^{2} \\ 2000 = 0.025 \times {v}^{2} \\ {v}^{2} = \frac{2000}{0.025} \\ {v}^{2} = 80000 \\ v = \sqrt{80000} = 282.84[/tex]
20. The kinetic energy of a 5 g bullet travels at 300 m/s is
Jawaban:
1.35 kJ
Penjelasan:
semoga membantu maaf kalau salah
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