When an object travels to the air, there is friction between the air and the object, it is called as . . . a. air resistance b. water resistance c. force d. friction
1. When an object travels to the air, there is friction between the air and the object, it is called as . . . a. air resistance b. water resistance c. force d. friction
Jawaban:
Air resistance
Penjelasan:
Hello, soalnya kalau diterjemahkan begini:
Ketika benda bergerak diudara, akan timbul gesekan antara udara dan benda yang disebut sebagai....
Jawaban yg paling pas adalah hambatan udara atau air resistance.
Semoga membantu
2. Friction is the force of resistance when two surfaces ...
Jawaban:
Friction is the resistance to motion of one object moving relative to another. It is not a fundamental force, like gravity or electromagnetism. Instead, scientists believe it is the result of the electromagnetic attraction between charged particles in two touching surfaces.
3. an ice hockey puck moves in a straight line with a velocity of 5m/s. It strikes a second identical puck, which is initially at rest, head on. The second puck moves off in the same straight line as the first puck with a velocity of 4m/s. Calculate the velocity of the first puck after the collision.
Jawaban:
keping hoki es bergerak dalam garis lurus dengan kecepatan 5m / s. Ini menyerang keping identik kedua, yang awalnya diam, langsung. Kepingan kedua bergerak lepas dalam garis lurus yang sama dengan keping pertama dengan kecepatan 4m / s. Hitung kecepatan kepingan pertama setelah tumbukan.
4. apa arti dari gliding joint?
Jawaban:
Sendi gliding sering disebut juga sendi pelana. Sendi ini memiliki permukaan yang datar dan kecil. Sendi ini bekerja dengan cara bergeser antar tulangnya. Sendi ini terdapat pada pergelangan tangan dan ankle
Penjelasan:
tolong jadikan jawaban tecerdas
Jawaban:
dalam bahasa inggrissendi meluncur
dalam bahasa indonesiagliding joint
Penjelasan:
semoga membantu teman5. How do you find the force, i know how only if there is no friction, i also dont know how to find energy loss, the specifications are in the picture above
a. The length of the ramp is s
s² = √( 240² + 100²)
s² = √67600
s = 260 cm = 2,6 m
sin θ = 100/260 = 0,38
The total energy needed to moves the box to the truck.
F - f - m.g.sin θ = 0
F = f + m.g.sin θ
F = 20 + 20. 10. 0,38
F = 96 N
b. The total energi loss due to friction
w = f. s
w = 20. 2,6 = 52 J
6. Gunakan kata "but" untuk menggabungkan 2 kalimat di bawah ini. Fact 1 : Friction is essential in brakes.Fact 2 : Friction is a nuisance in an engine.
Friction is essential in brakes but it is a nuisance in an engine.
Friction is essential in brakes, but it is a nuisance in an enginemaaf, klau slh! smg membantu!
7. An ice-skater pushes heself away from a wall. She slides on the ice for a distance before stopping. A) has the ice-skater done work when she pushed herself? B) friction is a force. Does friction di work on the ice-skater? Give reasons for you answer
jawab
Down vote
I agree with CuriousOne that the example is more confusing than helpful, but this is the way I would explain it.
Suppose you take a spring, place it on the ground then compress it. If you now suddenly let go of the spring it will rebound and bounce upwards off the ground:
Spring
The spring clearly has work done on it because its kinetic energy increases and that increase must have come from somewhere. However the ground can't have done any work on the spring because the ground hasn't moved. It should be obvious that the potential energy in the compressed spring has been converted into kinetic energy of the uncompressed spring - in effect the spring has done work on itself. This is what your book means by:
transfers of energy from one type to another inside the object
i.e. potential energy of the compressed spring has been converted into kinetic energy of the uncompressed spring.
In the case of the skater the skater's arms correspond to the spring and the rail corresponds to the ground. The skater's arm isn't a spring, of course, because it's chemical energy not potential energy being converted to kinetic energy by the skater's muscles. Nevertheless the same principle applies.
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Oct 17 '14 at 9:29
John Rennie
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Oct 17 '14 at 14:16
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I think this is a good example, and should be studied and understood carefully. But I don't know where the book goes after making it. Whether or not it is poorly stated depends on the surrounding context.
It focuses attention on two things:
1.) the skater is a deformable body. The center of mass is not fixed in the body.
2.) work is defined as a force times the displacement of the point of application.
(And, arguably a third aspect: the skater carries a store of chemical energy. But this fact is aside the point being made.)
In this case, the point of application does not move. There is no external work from that force. Both of these points are important to understand and remember. Typically, up to this point in a course, problems are implicitly formulated in terms of a point-particle model of an object. No internal structure. When deformable bodies are considered, certain things that work for point-particles no longer work. Additional analysis is needed.
Note that there is internal work being done. Chemical reactions contract muscle fibers. The fibers apply forces to tendons. Now there is a force and a displacement of the application of the force.
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Oct 17 '14 at 12:43
garyp
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So, with your point 2), you mean to say that when a car crashes into a tree, the tree doesn't do any work on the car because the point of application of its force is fixed? –
gatsu
Dec 17 '15 at 6:41
Absolutely correct. –
garyp
Sep 25 '16 at 2:13
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An initially ice-skater pushes away from a railing and then slides over the ice. Her kinetic energy increases because of an external force F⃗ on her from the rail . However, that force does not transfer energy from the rail to her. Thus, the force does no work on her.
This is simply confused: This example is nothing but an elastic collision between the girl and the rail. The example given by John is appropriate but I do not agree with him that the arms behave differently from a spring. Of course the ultimate source of energy is chemical, but the girl as a system behaves exactly like a steel spring or a football hitting the rail.
enter image description here
If the skater (m = 30 Kg) had a spring and was travelling at v = 4 m/s she would have KE = 240 J and would bounce back at (roughly) the same speed. If she stretches her arms and pushes at the rail (like a spring) she can acquire the same speed of 4 m/s producing net work of 240 J. Because of human muscle inefficiency she'll have to burn 4-5 times that amount of calories $\approx 1080 J$
The body is compressed against the rail like an elastic ball, then it stretches back (in a ball the whole body, in a skater the arms, in a swimmer in a pool or in a high-jumper the legs) giving acceleration to the whole body. I
8. Modern saw blades are coated with a special... plastic. A.reduction of friction B.reduced - friction C.'friction is reduced D.friction-reducing
Jawaban:
Jawabannya D. friction reducing
Penjelasan:
karena dalam konteks ini diminta untuk menjelaskan sifat maka yang paling tepat adalah friction reducing atau pengurang friksi, pilihan lain tidak sesuai sehingga salah
9. Mengapa pusat primate di kawasan Kebun Binatang Ragunan bernama Pusat Primata Schmutzer? * 1 poin A. Karena mendiangnya Nyonya Puck Schmutzer merupakan perancangnya. B. Karena mendiang Nyonya Puck Schmutzer merupakan pendirinya. C. Karena pusat Primata ini diberi dari mendiang Nyonya Puck Schmutzer. D. Karena mendiang Nyonya Puck Schmutzer adalah pengelola pusat primate ini
Jawaban:
C.
karena Pusat primata ini diberi dari mendiang nyonya puck schmutzer
10. what is the work done by this friction force?
apa artinya tuuuuuuuuuDalam mengajukan pertanyaan ini, Anda tidak menyadari bahwa sebagian besar pekerjaan yang terjadi pada bidang horizontal dilakukan dengan gesekan, dan terhadap gesekan.
Seperti telah disebutkan, kerja = paksa x jarak.
Dengan gesekan, gaya = n di mana N adalah gaya antara dua permukaan, dan u adalah ko-efisien gesekan geser (gesekan statis tidak bekerja sama sekali, karena tidak ada jarak yang terlibat).
Jadi kerja = u x N x d
Koefisien gesekan antara dua permukaan, dikalikan dengan gaya antara dua permukaan dikalikan dengan jarak yang ditempuh dari satu permukaan relatif terhadap yang lain.
Akhirnya, pekerjaan biasanya dilakukan dengan gesekan untuk mengatasi friksi, jadi berhati-hatilah dengan konteks Anda. Anda mungkin bisa mengukur ini dalam jawaban Anda.
11. A hockey puck slides off the edge of a table at point A with an initial velocity of 20.0 m/s and experiences no air resistance. The height of the tabletop above the ground is 2.00 m. (a) What is the speed (not the velocity) of the puck just before it touches the ground
Jawaban:
21 m/s
Penjelasan:
semoga membantu dan tetap semangat guys
12. Friction is the force that ... motion when two surfaces are in contact. * 10 points A. opposes B. block C. see
Jawaban:
b. blok
semoga membantu
13. The surface is smooth, the friction will be A. taller B. smaller C. biger D. same
Jawaban:
A bigger
Penjelasan:
maaf kalo salah
Jawaban:
c,biger maap kalau ada yang salah
14. what is the advantage and disadvantage of increasing friction?
The advantage of increasing the friction is we only give small force when do the break or other action that will decrease the thing's velocity. The disadvantange of increasing friction is we must give bigger initial force when do the acceleration or other action that will increase the thing's velocity. Pembahasan : Friction (Gaya Gesek)
Friction (gaya gesek) adalah suatu gaya yang terjadi karena benda bergesekan dengan bidang geraknya. Gaya gesek dibagi menjadi gaya gesek statis dan gaya gesek kinetis. Gaya gesek ini dapat diperbesar atau diperkecil jumlahnya sebagai berikut :
Saat kita memperkasar bidang sentuh benda atau memperkasar permukaan bawah benda, maka gaya gesek akan semakin besar.Saat kita memperhalus bidang sentuh benda atau memperhalus permukaan benda, maka gaya gesek akan semakin kecil. Keuntungan dan Kerugian Memperbesar Gaya Gesek KeuntunganSaat melakukan pengereman atau apapun yang menyebabkan pengurangan kecepatan, kita hanya perlu memberikan sedikit gaya. Mengapa demikian ? Karena, saat terjadi gesekan yang besar, gesekan ini selalu memiliki kontak dengan benda yang bergerak. Gesekan ini selalu berusaha untuk mengurangi kecepatan benda dan saat melakukan pengereman, gaya gesek akan membantu prosesnya.
KerugianSaat melakukan percepatan atau apapun yang menyebabkan pertambahan kecepatan, kita harus memberikan gaya awal yang lebih besar. Mengingat gaya gesek ini akan selalu memiliki kontak dengan bidang sentuh, sehingga semakin besar gaya gesek, kita juga mengeluarkan gaya yang lebih besar saat memulai pergerakan suatu benda.
Detail Soal :Kelas : 10
Mata Pelajaran : Fisika
Materi : Bab 6 - Hukum Newton (Gerak)
Kata Kunci : Pengaruh gaya gesek; keuntungan; kerugian
Kode Kategorisasi : 10.6.6
Pelajari Lebih Lanjut : Perbedaan gaya gesek statis dan kinetis https://brainly.co.id/tugas/1248325815. i) Draw a circle around the places on the drawing where there should be a lot of friction.
Jawab:
Penjelasan dengan langkah-langkah:
16. Which of the following statements about friction are true?1) Friction is type of force.2) Friction prevents us from slipping when we walk.3) Friction causes moving objects to slow down and stop.4) Friction is produced when two surfaces rub against each other.0 1 and 4 onlyO 2 and 3 onlyO 1, 3 and 4 onlyO1, 2, 3 and 4
Jawaban:
1 and 4 Only
Penjelasan:
17. What is the disadvantages of friction
emmm aku ga bisa bahasa inggris tolong jelaskan yah
18. A 600 kg car is on travelling with a constant speed of 4.75 m/s. Assuming there are no friction on it’s track, calculate the resultant force of the car !
Jawaban:
Force = mass x acceleration
= 600 x 4.75 = 2750N
19. 1. ............... is push or pull A. Friction B. Force C. SpeedD. Weight
Jawaban:
D.Weight
maaf kalau salah
20. A spacecraft is freed from friction .... launched into space
And, maaf kalo salah
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