# Penilaian Harian 1 - SiSTEM Gerak Pada Benda [gerak Lurus]

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| By Rizka Novia
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Rizka Novia
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Quizzes Created: 1 | Total Attempts: 1,053
Questions: 17 | Attempts: 1,053

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Questions and Answers
• 1.

• 2.

• 3.

### Seorang anak meluncur maju di jalan seperti pada gambar berikut tanpa mengayuh pedal sepeda.jenis gerak lurus berubah beraturan (GLBB) yang terjadi pada sepeda ketika melalui lintasan adalah…

• A.

[A - B = GLBB dipercepat]  [C - D = GLBB dipercepat]

• B.

[A - B = GLBB diperlambat]  [C - D = GLBB dipercepat]

• C.

[A - B = GLBB diperlambat]  [C - D = GLBB diperlambat]

• D.

[A - B = GLBB dipercepat]  [C - D = GLBB diperlambat]

Correct Answer
D. [A - B = GLBB dipercepat]  [C - D = GLBB diperlambat]
Explanation
The correct answer is [A - B = GLBB dipercepat] [C - D = GLBB diperlambat]. This is because the child is moving forward without pedaling, indicating that there is an external force acting on the bike to accelerate it. This acceleration is represented by the GLBB dipercepat (accelerated uniform motion) in the first part of the answer. However, as the child moves further along the road, the bike eventually slows down and comes to a stop, indicating that there is a decelerating force acting on it. This deceleration is represented by the GLBB diperlambat (decelerated uniform motion) in the second part of the answer.

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• 4.

### Perhatikan beberapa peristiwa dalam kehidupan sehari-hari berikut ini (1) Balok yang meluncur ke bawah pada bidang miring dan licin (2) Seseorang bersepeda menuruni bukit tanpa dikayuh (3) Sebuah batu dilempar vertikal ke atas sampai mencapai titik tertingginya (4) Bola pingpong menggelinding di atas pasir Peristiwa yang merupakan contoh GLBB diperlambat ditunjukkan oleh nomor …

• A.

(1) dan (2)

• B.

(1) dan (3)

• C.

(2) dan (4)

• D.

(3) dan (4)

Correct Answer
D. (3) dan (4)
Explanation
The correct answer is (3) and (4) because both events involve a change in velocity over time. In event (3), the stone is thrown upwards and its velocity decreases until it reaches its highest point. In event (4), the ping pong ball is rolling on sand, which creates friction and slows down its velocity. Both of these events can be described by the equation of motion for uniformly accelerated motion, also known as GLBB (Gerak Lurus Beraturan Berubah).

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• 5.

### Mobil bergerak dengan kecepatan 90 km/jam direm sehingga setelah 4 s kecepatannya menjadi 17 m/s. percepatan yang dialami mobil adalah… m/s2

• A.

4

• B.

2

• C.

-2

• D.

-4

Correct Answer
B. 2
Explanation
The question provides information about a car moving at a speed of 90 km/h and then being braked until its speed becomes 17 m/s after 4 seconds. To find the acceleration, we can use the formula: acceleration = (final velocity - initial velocity) / time. Converting the initial velocity to m/s (90 km/h = 25 m/s) and applying the formula, we get: acceleration = (17 m/s - 25 m/s) / 4 s = -2 m/s^2. Therefore, the correct answer is -2.

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• 6.

### Mobil bergerak dengan kecepatan 40 m/s dan diperlambat dengan perlambatan 5 m/s2 sampai berhenti. Waktu yang diperlukan mobil tersebut sampai berhenti…

• A.

6 s

• B.

8 s

• C.

10 s

• D.

12 s

Correct Answer
B. 8 s
Explanation
The time it takes for the car to come to a stop can be found using the equation v = u + at, where v is the final velocity, u is the initial velocity, a is the acceleration, and t is the time. In this case, the initial velocity is 40 m/s, the final velocity is 0 m/s (since the car comes to a stop), and the acceleration is -5 m/s^2 (negative because the car is decelerating). Plugging in the values, we get 0 = 40 + (-5)t. Solving for t, we find t = 8 s.

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• 7.

### Grafik di bawh ini menunjukkan gerak lurus beraturan dari Edi yang naik sepeda. Dalam waktu 30 menit, kecepatan dan jarak ditempuh adalah…

• A.

2 m/s, 10 km

• B.

4 m/s, 24 km

• C.

6 m/s, 10,8 km

• D.

10 m/s, 180 km

Correct Answer
C. 6 m/s, 10,8 km
Explanation
The graph shows a straight and constant motion of Edi riding a bicycle. In 30 minutes, the speed is 6 m/s and the distance covered is 10.8 km.

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• 8.

### Jarak kota A dan B 960 km. Nono berangkat dari kota A pada pukul 20.00 hari Minggu dengan mengendarai dan tiba di kota B pada hari Senin pukul 08.00. Kelajuan rata-rata mobil Andi adalah .... km/jam

• A.

88

• B.

80

• C.

78

• D.

70

Correct Answer
B. 80
Explanation
Nono took a total of 12 hours to travel from city A to city B. He started at 20.00 on Sunday and arrived at 08.00 on Monday. The distance between the two cities is 960 km. To find the average speed of Andi's car, we divide the total distance by the total time taken. Therefore, the average speed of Andi's car is 960 km divided by 12 hours, which equals 80 km/h.

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• 9.

### Di bawah ini merupakan grafik jarak terhadap waktu dari Fahmi yang sedang berlari lurus. Dalam bagan manakah yang menujukkan Fahmi bergerak dengan kelajuan paling kecil?

• A.

P - Q

• B.

Q - R

• C.

R - S

• D.

S - T

Correct Answer
D. S - T
Explanation
The graph represents the distance versus time of Fahmi running in a straight line. The slope of the line represents the velocity. The steeper the slope, the greater the velocity. In this case, the line segment S-T has the smallest slope, indicating the smallest velocity. Therefore, Fahmi is moving with the smallest velocity in the S-T segment.

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• 10.

### Dari grafik kecepatan di bawah ini dapat disimpulkan

• A.

Benda mengalami GLB dengan kecepatan tetap 4 m/s

• B.

Benda mengalami GLB dengan kecepatan tetap 10 m/s

• C.

Benda mengalami GLBB dipercepat

• D.

Benda mengalami GLBB diperlambat

Correct Answer
B. Benda mengalami GLB dengan kecepatan tetap 10 m/s
• 11.

### Empat anak bergerak selama 20 sekon dan masing-masing menempuh jarak yang berbeda yaitu : Avi menempuh jarak 80 m, Dyana menempuh jarak 100 m, Nia menempuh jarak 120 m, Arisa menempuh jarak 150 m. Benda yang kecepatanya paling kecil adalah…

• A.

Avi

• B.

Dyana

• C.

Arisa

• D.

Nia

Correct Answer
A. Avi
Explanation
Avi menempuh jarak yang paling kecil dibandingkan dengan anak lainnya. Oleh karena itu, kecepatannya juga paling kecil.

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• 12.

### Pemain bola yang menendang bola merupakan contoh penerapan dari gerak lurus dalam kehidupan sehari-hari.

• A.

True

• B.

False

Correct Answer
B. False
Explanation
The statement is false because kicking a ball is an example of projectile motion, not linear motion. Linear motion refers to an object moving in a straight line with constant speed, while projectile motion involves an object being launched into the air and following a curved path due to the influence of gravity.

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• 13.

### Sebuah mobil yang bergerak lurus dijalan raya dengan spedometer yang menunjuk angka 60 dari menit 10 sampai 60 merupakan contoh dari penerapan GLB.

• A.

True

• B.

False

Correct Answer
A. True
Explanation
The given statement suggests that a car moving in a straight line on a highway with a speedometer reading 60 from minute 10 to 60 is an example of the application of GLB. This implies that the car is moving with a constant velocity of 60 units, indicating that it is experiencing uniform motion. GLB, or Gerak Lurus Berubah, refers to uniform motion with a constant velocity. Therefore, the statement is true.

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• 14.

### Kecepatan adalah rata-rata jarak yang ditempuh setiap satuan waktu tertentu

• A.

True

• B.

False

Correct Answer
B. False
Explanation
The given statement is incorrect. Kecepatan is not the average distance traveled per unit of time, but rather the rate at which an object changes its position in a specific direction. It is defined as the distance traveled divided by the time taken to travel that distance. Therefore, the correct answer is False.

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• 15.

### Percepatan adalah perubahan kecepatan dengan satuan waktu m/s.

• A.

True

• B.

False

Correct Answer
B. False
Explanation
The statement is false because acceleration is the rate of change of velocity with respect to time, not speed. Velocity is a vector quantity that includes both magnitude (speed) and direction. Therefore, acceleration is measured in units of meters per second squared (m/s²), not meters per second (m/s).

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• 16.

### Semakin besar jarak tempuh dengan waktu yang relatif singkat akan menunjukkan kecepatan yang sangat besar.

• A.

True

• B.

False

Correct Answer
A. True
Explanation
The statement implies that a large distance covered in a relatively short amount of time indicates a high speed. This is a valid explanation because speed is defined as the distance traveled per unit of time. Therefore, if the distance is large and the time is short, the speed must be high.

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• 17.

### Tabel berikut memuat jarak dan waktu tempuh gerak suatu benda! Seorang siswa melakukan percobaan gerak benda, sebanyak tiga kali seperti tabel dibawah ini. Jenis gerak yang  terjadi pada benda 1 dan 2 berturut-turut adalah .... .

• A.

GLB dan GLBB diperlambat

• B.

GLB dan GLBB dipercepat

• C.

GLBB dipercepat dan GLB

• D.

GLBB diperlambat dan GLB

Correct Answer
B. GLB dan GLBB dipercepat
Explanation
Dari tabel yang diberikan, terlihat bahwa waktu tempuh untuk setiap percobaan semakin berkurang. Hal ini menunjukkan bahwa benda tersebut mengalami percepatan. GLB (Gerak Lurus Beraturan) adalah gerakan dengan kecepatan konstan, sedangkan GLBB (Gerak Lurus Berubah Beraturan) adalah gerakan dengan percepatan. Oleh karena itu, dapat disimpulkan bahwa jenis gerak yang terjadi pada benda 1 dan 2 berturut-turut adalah GLB dan GLBB dipercepat.

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• Current Version
• Mar 20, 2023
Quiz Edited by
ProProfs Editorial Team
• Aug 25, 2019
Quiz Created by
Rizka Novia
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