# Tekanan Hidrostatis

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TEKANAN HIDROSTATIS

• 1.

• A.

Sebanding dengan luas bidang sentuh berbanding terbalik dengan gaya yang bekerja

• B.

Sebanding dengan gaya yang bekerja dan berbanding terbalik dengan luas bidang sentuh

• C.

Sebanding dengan massa benda berbanding terbalik dengan luas bidang sentuh

• D.

Sebanding dengan luas bidang sentuh dan sebanding dengan gaya yang bekerja

B. Sebanding dengan gaya yang bekerja dan berbanding terbalik dengan luas bidang sentuh
Explanation
The correct answer states that the pressure on a solid substance is directly proportional to the force applied and inversely proportional to the area of contact. This means that as the force increases, the pressure also increases, and as the area of contact decreases, the pressure increases. This relationship is consistent with the definition of pressure, which is the force per unit area.

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• 2.

### Perhatikan gambar. Luas penampang benda di bawah ini dapat dianggap mewakili berat benda,. maka yang memiliki tekanan paling besar adalah...

• A.

A

• B.

B

• C.

C

• D.

D

B. B
Explanation
The correct answer is b. Based on the given information that the area of the cross-section represents the weight of the object, we can conclude that the object with the largest cross-sectional area will have the greatest weight. Therefore, the object represented by b, which has the largest cross-sectional area, will have the highest pressure.

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• 3.

### Tiga balok yang sejenis mempunyai ukuran yang sama baik volum maupun beratnya. Ketiga balok terletak di lantai dengan posisi seperti tampak pada gambar. Yang tekanannya terbesar adalah ....

• A.

Q

• B.

R

• C.

S

• D.

Q=R=S

B. R
Explanation
The three identical blocks are placed on the floor in a specific arrangement. Since the blocks have the same size and weight, the pressure exerted by each block is determined by the area of contact between the block and the floor. In this arrangement, block R has the smallest area of contact with the floor compared to blocks Q and S. Therefore, block R exerts the highest pressure on the floor among the three blocks.

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• 4.

### Balon yang belum ditiup dan balon yang sudah ditiup digantung pada setiap ujung sebuah lidi. Kedua balon tidak seimbang karena....

• A.

Udara menempati ruang

• B.

Udara memiliki massa

• C.

Udara memiliki massa dan menempati ruang

• D.

Udara adalah zat yang senantiasa bergerak

C. Udara memiliki massa dan menempati ruang
Explanation
The correct answer is "udara memiliki massa dan menempati ruang" because both statements are true. Air has mass, which means it has weight and takes up space. This is why the balloons, one filled with air and one not, are imbalanced when hung on a string. The filled balloon has air inside it, which adds mass and takes up space, causing it to weigh more than the empty balloon.

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• 5.

• A.

Menguap

• B.

Mengembun

• C.

Menyublim

• D.

Mengkristal

C. Menyublim
Explanation
The process of changing from a solid state directly to a gas state is called sublimation. This occurs when the substance's vapor pressure exceeds its melting point, causing it to bypass the liquid phase and go straight to a gas.

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• 6.

### Pemanfaatan kapilaritas antara lain pada....

• A.

Air mancur

• B.

Instalasi air

• C.

Handuk mandi

• D.

Termometer

C. Handuk mandi
Explanation
The utilization of capillarity is seen in handuk mandi or bath towels. Capillarity is the ability of a liquid to flow in narrow spaces or tubes, against the force of gravity. In the case of handuk mandi, the capillarity allows the towel to absorb water and moisture from the body, making it an effective tool for drying oneself after a bath or shower.

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• 7.

• A.

Kohesi

• B.

• C.

Tegangan permukaan

• D.

Gaya tarik-menarik

Explanation

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• 8.

### Seseorang yang menyelam terlalu dalam akan merasa pernapasannya sesak karena....

• A.

Air yang mendesak terlalu luas

• B.

Semakin ke dalam tekanan air makin besar

• C.

Terlalu lama di dalam air

• D.

Suhu air di dalam rendah

B. Semakin ke dalam tekanan air makin besar
Explanation
When someone dives deeper into the water, the pressure of the water increases. This increased pressure can cause the person to feel breathless or short of breath.

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• 9.

### Tekanan hidrostatis pada benda P yang kedalamannya 10 m dan Q yang kedalamannya 40 m adalah...

• A.

DiP lebih besar danpada di Q sebab Q lebih dalam

• B.

DiP lebih besar daripada di Q sebab P Iebih dangkal

• C.

DiP lebih kecil daripada di Q sebab P lebih dangkal

• D.

Di P sama dengan di Q sebab zat cairnya sama

C. DiP lebih kecil daripada di Q sebab P lebih dangkal
Explanation
The pressure exerted by a fluid at a certain depth is directly proportional to the depth of the fluid. In this case, the depth of P is 10 m and the depth of Q is 40 m. Since P is shallower than Q, the pressure exerted by P will be smaller than the pressure exerted by Q. Therefore, the statement "diP lebih kecil daripada di Q sebab P lebih dangkal" is the correct answer.

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• 10.

### Berikut adalah penerapan konsep tekanan dalam kehidupan sehari—hari. (1) Lebih mudah mengiris daging dengan pisau runcing. (2) Lebih nyaman tidur di kasur daripada di lantai. (3) Bebek lebih mudah bergerak di tanah berlumpur daripada ayam. (4) Lebih mudah mengangkat beban dengan menggunakan katrol. (5) Ukuran telapak kaki gajah besar. (6) Traktor pertanian memiliki roda dan ban yang lebar. (7) Timba Iebih ringan diangkat ketika berada dalam air daripada ketika muncul di udara. Pernyataan yang benar adalah....

• A.

(1)—(2)—(3)—(4)—(6)

• B.

(1)—(2)—(3)—(5)—(6)

• C.

(1 )—(2)—(4)—(6)—(7)

• D.

(1 )—(2)—(4)—(5)—(6)

B. (1)—(2)—(3)—(5)—(6)
Explanation
The correct answer is (1)—(2)—(3)—(5)—(6). This sequence represents different examples of the application of pressure in everyday life. The first statement explains that it is easier to cut meat with a sharp knife, which is due to the pressure applied by the knife on the meat. The second statement states that sleeping on a mattress is more comfortable than on the floor, which is because the mattress provides pressure relief and support. The third statement suggests that a duck can move more easily on muddy ground compared to a chicken, which is because the duck's webbed feet distribute pressure over a larger surface area. The fifth statement mentions that elephants have large footprints, indicating that their weight is distributed over a larger area, reducing pressure. Lastly, the sixth statement explains that agricultural tractors have wide wheels to distribute their weight and reduce pressure on the ground.

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• 11.

### Batang korek api yang dijepit, tekanan pada ujung satu terasa lebih besar daripada ujung yang ada gumpalannya. Hal ini dikarenakan ....

• A.

Bidang sentuh lebih kecil

• B.

Gaya yang bekerja lebih besar

• C.

Massa lebih kecil

• D.

Korek api terbuat dari kayu

A. Bidang sentuh lebih kecil
Explanation
The correct answer is "bidang sentuh lebih kecil". When a matchstick is clamped, the pressure on one end is greater than the end with the lump because the area of contact is smaller. The smaller the area of contact, the greater the pressure exerted.

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• 12.

• A.

Sebanding dengan luas bidang sentuh berbanding terbalik dengan gaya yang bekerja

• B.

Sebanding dengan gaya yang bekerja dan berbanding terbalik dengan luas bidang sentuh

• C.

Sebanding dengan gaya yang bekerja dan sebanding dengan luas bidang sentuh

• D.

Sebanding dengan massa benda berbanding terbalik dengan luas bidang sentuh

B. Sebanding dengan gaya yang bekerja dan berbanding terbalik dengan luas bidang sentuh
Explanation
The correct answer is "sebanding dengan gaya yang bekerja dan berbanding terbalik dengan luas bidang sentuh". This is because pressure is defined as the force applied per unit area. Therefore, the pressure is directly proportional to the force applied and inversely proportional to the area of contact.

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• 13.

### Besarnya tekanan hidrostatis bergantung pada: (1) ketinggian zat cair (2) massa jenis zat cair (3) luas permukaan zat cair (4) gaya gravitasi bumi Pernyataan yang benar adalah . . . .

• A.

(1), (3), dan (4)

• B.

(2), (3), dan (4)

• C.

(1), (2), dan (3)

• D.

(1), (2), dan (4)

D. (1), (2), dan (4)
Explanation
The correct answer is (1), (2), and (4). The hydrostatic pressure depends on the height of the liquid, the density of the liquid, and the gravitational force. All three factors contribute to determining the magnitude of the hydrostatic pressure.

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• 14.

### Hubungan antara gaya, luas bidang tekan, dan tekanan adalah ….

• A.

Jika gaya semakin besar dan luas bidang tetap, tekanan semakin kecil

• B.

Jika gaya semakin besar dan luas bidang semakin kecil, tekanan tetap

• C.

Jika gaya tetap dan luas bidang semakin besar, tekanan semakin kecil

• D.

Jika gaya tetap dan luas bidang semakin besar, tekanan semakin besar

C. Jika gaya tetap dan luas bidang semakin besar, tekanan semakin kecil
Explanation
The relationship between force, area, and pressure is described by the formula: pressure = force / area. According to this formula, if the force remains constant and the area increases, the pressure will decrease. This is because as the area increases, the force is spread out over a larger surface, resulting in a lower pressure. Therefore, the statement "jika gaya tetap dan luas bidang semakin besar, tekanan semakin kecil" is the correct answer.

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• 15.

### Benda yang sama dapat mengakibatkan tekanan yang sama besar atau tekanan yang terkecil posisi benda mempengaruhi besar tekanan tersebut. Hal ini menunjukkan bahwa tekanan bergantung kepada ….

• A.

Warna benda

• B.

Jenis benda

• C.

Massa benda

• D.

Luas permukaan bidang tekan

D. Luas permukaan bidang tekan
Explanation
This question is asking what pressure depends on. The correct answer is "luas permukaan bidang tekan" which means the surface area of the contact area. This means that the larger the surface area, the smaller the pressure, and vice versa.

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• 16.

C.
• 17.

### Apabila benda-benda berikut ini mempunyai berat sama, maka yang mempunyai tekanan terhadap lantai paling besar adalah ….

A.
Explanation
Benda yang memiliki tekanan terbesar terhadap lantai adalah benda yang memiliki luas permukaan yang lebih kecil. Ini karena tekanan adalah gaya yang diberikan oleh suatu benda pada luas permukaan yang bersentuhan dengannya. Jadi, jika benda-benda tersebut memiliki berat yang sama, benda dengan luas permukaan yang lebih kecil akan memiliki tekanan yang lebih besar pada lantai.

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• 18.

### Perhatikan gambar berikut. Setiap balok memiliki massa yang sama besar. 1.  2.   3.  4.  Jika diberikan gaya yang sama pada masing-masing balok, yang mempunyai tekanan terbesar terhadap bidang tekan adalah balok nomor ….

• A.

1

• B.

2

• C.

3

• D.

4

D. 4
Explanation
Balok nomor 4 memiliki tekanan terbesar terhadap bidang tekan. Ini disebabkan oleh fakta bahwa gaya yang diberikan pada setiap balok adalah sama, tetapi balok nomor 4 memiliki luas permukaan yang lebih kecil dibandingkan dengan balok lainnya. Tekanan didefinisikan sebagai gaya yang diberikan per unit luas, jadi dengan luas permukaan yang lebih kecil, tekanan pada balok nomor 4 akan lebih besar daripada balok lainnya.

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• 19.

### Sebuah benda yang beratnya 400 N akan diletakkan di atas meja. Tekanan di atasmeja tidak boleh melebihi 160 pascal. Berapakah luas permukaan benda? .........

• A.

Maksimum 5

• B.

Minimum 5

• C.

Maksimum 2,5

• D.

Minimum 2,5

C. Maksimum 2,5
Explanation
The maximum surface area of the object is 2.5 square meters because the pressure on the table should not exceed 160 pascals. Pressure is calculated by dividing force by area, so if the force is 400 N and the pressure should not exceed 160 pascals, the maximum surface area can be found by dividing the force by the maximum pressure: 400 N / 160 pascals = 2.5 square meters.

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• 20.

### Berikut ini adalah penerapan konsep tekanan dalam kehidupan sehari-hari, kecuali .......

• A.

Menusuk daging sate lebih mudah menggunakan bambu lancip

• B.

Ayam lebih mudah berjalan di lumpur daripada bebek

• C.

Berjalan menggunakan sepatu berhak tinggi pada tanah berlumpur lebih sukar daripada dengan sepatu boot

• D.

Gajah mempunyai telapak kaki yang luas agar mudah berjalan

B. Ayam lebih mudah berjalan di lumpur daripada bebek
Explanation
The given options are examples of how pressure is applied in everyday life. The options mention how different objects or animals interact with their surroundings. However, the statement "ayam lebih mudah berjalan di lumpur daripada bebek" does not relate to the concept of pressure. It is comparing the ease of walking in mud for a chicken and a duck, which does not involve the application of pressure.

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• 21.

### Suatu tabung berisi gas dengan tekanan 3.000 Pa. Tentukankanlah besar gaya yang bekerja pada dinding seluas 6 dm2 di dalam tabung tersebut!

• A.

50 N

• B.

150 N

• C.

180 N

• D.

240 N

C. 180 N
Explanation
The force exerted on the wall of the cylinder can be calculated using the formula: force = pressure x area. In this case, the pressure is given as 3,000 Pa and the area is given as 6 dm2. Converting the area to square meters gives us 0.06 m2. Multiplying the pressure and area gives us a force of 180 N. Therefore, the correct answer is 180 N.

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• 22.

### Besar tekanan dalam zat cair dipengaruhi oleh tinggi permukaan zat cair dan ....

• A.

Bentuk bejana

• B.

Volume zat cair

• C.

Massa jenis zat cair

• D.

Luas permukaan zat cair

C. Massa jenis zat cair
Explanation
The pressure in a liquid is influenced by the density of the liquid. The density of a liquid is determined by its mass per unit volume, which is known as its mass density or mass per unit volume. Therefore, the pressure in a liquid is affected by the mass density of the liquid.

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• 23.

• A.

7.500 Pa

• B.

2.500 Pa

• C.

750 Pa

• D.

250 Pa

A. 7.500 Pa
• 24.

### Beberapa benda terletak di atas lantai mendatar. Tekanan yang paling kecil ditunjukkan oleh gambar ....

• A.

A

• B.

B

• C.

C

• D.

D

B. B
Explanation
The correct answer is B because the object in B is shown to be the highest off the ground compared to the other objects. Since pressure is directly related to the height of an object, the object in B would have the least pressure on the horizontal floor.

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• 25.

### Dasar sebuah bak memiliki panjang 1 m dan lebar 0,5 m. Bak itu diisi dengan minyak tanah setinggi 60 cm. Massa jenis minyak tanah 0,8 gr/cm3. Besar percepatan gravitasi Bumi (g) = 10 N/kg. Tentukanlah tekanan hirostatis yang terjadi di dasar bak.

• A.

400 Pa

• B.

480 Pa

• C.

4.000 Pa

• D.

4.800 Pa

D. 4.800 Pa
Explanation
The hydrostatic pressure at the bottom of a container is given by the formula P = ρgh, where P is the pressure, ρ is the density of the fluid, g is the acceleration due to gravity, and h is the height of the fluid column. In this case, the density of the kerosene is 0.8 g/cm3, the acceleration due to gravity is 10 N/kg, and the height of the kerosene column is 60 cm. Plugging these values into the formula, we get P = (0.8 g/cm3)(10 N/kg)(60 cm) = 4800 Pa. Therefore, the hydrostatic pressure at the bottom of the container is 4800 Pa.

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• 26.

### Dasar sebuah bak memiliki panjang 1 m dan lebar 0,5 m. Bak itu diisi dengan minyak tanah setinggi 60 cm. Massa jenis minyak tanah 0,8 gr/cm3. Besar percepatan gravitasi Bumi (g) = 10 N/kg. Tentukanlah besar gaya hidrostatis yang ditopang oleh dasar bak.

• A.

4.800 N

• B.

2.400 N

• C.

480 N

• D.

240 N

C. 480 N
Explanation
The formula to calculate the hydrostatic force is F = ρghA, where ρ is the density of the fluid (0.8 g/cm3), g is the acceleration due to gravity (10 N/kg), h is the height of the fluid (60 cm), and A is the area of the base of the container (1 m * 0.5 m = 0.5 m2). Plugging in these values, we get F = (0.8 g/cm3) * (10 N/kg) * (60 cm) * (0.5 m2) = 480 N. Therefore, the correct answer is 480 N.

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• 27.

• A.

Di P lebih besar daripada di Q sebab Q lebih dalam

• B.

Di P lebih besar daripada di Q sebab P lebih dangkal

• C.

Di P lebih kecil daripada di Q sebab P lebih dangkal

• D.

Di P sama dengan di Q sebab zat cairnya sama

C. Di P lebih kecil daripada di Q sebab P lebih dangkal
Explanation
The pressure at point P is smaller than at point Q because point P is shallower.

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• 28.

### Air yang dimasukkan pada wadah yang berbentuk seperti gambar akan mempunyai tekanan hidrostatis tertentu. Titik yang tekanan hidrostatisnya palin besar ….

• A.

A

• B.

B

• C.

C

• D.

D

D. D
Explanation
The explanation for the correct answer D is that the point with the highest hydrostatic pressure is located at the bottom of the container. This is because the pressure exerted by a fluid at a certain depth is directly proportional to the depth of the fluid. As the depth increases, the weight of the fluid above it increases, resulting in higher pressure at the bottom. Therefore, the point at the bottom of the container will have the highest hydrostatic pressure.

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• 29.

### Perhatikan gambar! Hubungan tekanan P yang benar di titik-titik pada dasar bejana adalah ….

• A.

P di A > P di B > P di C

• B.

P di A < P di B < P di C

• C.

P di A = P di B = P di C

• D.

P di A > P di B = P di C

C. P di A = P di B = P di C
Explanation
The correct answer is that the pressure at point A is equal to the pressure at point B, which is also equal to the pressure at point C. This means that the pressure is the same at all points on the bottom of the container.

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• 30.

### Empat buah balon karet yang terbuat dari bahan yang sama diisi dengan gas seperti pada gambar. Yang mempunyai tekanan yang paling besar adalah ….

• A.

A

• B.

B

• C.

C

• D.

D

A. A
Explanation
The balloon with the highest pressure is likely to be A because it appears to be the most inflated compared to the other balloons. When a balloon is inflated, the gas inside it becomes more compressed, resulting in higher pressure. Therefore, the more inflated a balloon is, the higher its pressure is likely to be.

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• Mar 21, 2023
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• Dec 02, 2012
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