Soal Ulangan Harian IPA Kelas VII Semester Genap "Gerak"

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• 1.

Mengapa suatu benda dikatakan bergerak ?

• A.

Karena jarak benda itu tidak berubah terhadap benda lain

• B.

Karena kedudukan benda itu jauh terhadap benda lain

• C.

Karena kedudukan benda itu berimpit terhadap benda lain

• D.

Karena kedudukan benda berubah terhadap titik acuan

D. Karena kedudukan benda berubah terhadap titik acuan
Explanation
The correct answer states that an object is considered to be moving because its position changes relative to a reference point. This means that the object's location is not fixed and it is changing with respect to a specific point of reference. This explanation aligns with the concept of motion, where an object is said to be in motion if its position changes over time.

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• 2.

• A.

M.s

• B.

Detik

• C.

Km/jam

• D.

M/s

D. M/s
Explanation
The correct answer is m/s. In the SI system, the unit for speed is meters per second (m/s). This unit represents the distance traveled in meters divided by the time taken in seconds. It is commonly used in scientific and engineering calculations as it provides a precise measurement of speed.

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• 3.

Perpindahan termasuk besaran vektor karena ...

• A.

Memiliki nilai dan arah

• B.

Memiliki nilai saja

• C.

Memiliki arah saja

• D.

Tidak memiliki niali dan arah

A. Memiliki nilai dan arah
Explanation
Perpindahan termasuk besaran vektor karena memiliki nilai dan arah. Besaran vektor adalah besaran yang memiliki magnitude (nilai) dan arah. Dalam konteks perpindahan, nilai mengacu pada jarak atau magnitude perpindahan yang terjadi, sedangkan arah mengacu pada arah perpindahan tersebut. Dengan kata lain, perpindahan tidak hanya memiliki nilai (jarak) tetapi juga arah yang menunjukkan ke mana objek bergerak.

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• 4.

Suatu benda dikatakan mengalami perpindahan jika ...

• A.

Kedudukan benda itu tetap

• B.

Kedudukan benda itu berubah

• C.

Kedudukan benda itu tidak berubah

• D.

Benda itu tidak bergerak

B. Kedudukan benda itu berubah
Explanation
When we say that an object is experiencing "perpindahan" (displacement), it means that the position of the object is changing. Therefore, the correct answer is "kedudukan benda itu berubah" (the position of the object changes). This implies that the object is moving or being moved from one place to another.

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• 5.

• A.

V = s/t

• B.

T = s/v

• C.

S = v - t

• D.

S = v.t

A. V = s/t
Explanation
The given equation v = s/t represents the relationship between velocity (v), displacement (s), and time (t) and is commonly known as the formula for average velocity. It states that velocity is equal to the ratio of displacement to time. However, the equation v = s/t is not correct because it does not accurately represent the relationship between velocity, displacement, and time.

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• 6.

Gerak lurus adalah gerak yang lintasannya berbentuk …

• A.

Garis lurus

• B.

Garis Lengkung

• C.

Lingkaran

• D.

Parabola

A. Garis lurus
Explanation
Gerak lurus adalah gerak yang lintasannya berbentuk garis lurus. Ini berarti bahwa benda yang mengalami gerak lurus bergerak dalam satu arah tanpa mengalami perubahan arah atau melibatkan gerakan melingkar atau melengkung. Lintasan benda yang mengalami gerak lurus dapat dilihat sebagai garis lurus yang membentang dari titik awal ke titik akhir tanpa ada perubahan arah di antara keduanya.

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• 7.

Sebuah mobil menempuh jarak 60 meter dalam waktu 0,5 menit. Kecepatan mobil tersebut adalah  …

• A.

10 m/s

• B.

5 m/s

• C.

2 m/s

• D.

1 m/s

C. 2 m/s
Explanation
The correct answer is 2 m/s. This is because speed is calculated by dividing the distance traveled by the time taken. In this case, the distance traveled is 60 meters and the time taken is 0.5 minutes. Converting the time to seconds (0.5 minutes = 30 seconds), we can calculate the speed as 60 meters / 30 seconds = 2 m/s.

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• 8.

Pada GLB, perubahan kecepatan selalu ...

• A.

Tetap setiap detik

• B.

Berbeda setiap detik

• C.

Lebih besar setiap detik

• D.

Lebih kecil setiap detik

A. Tetap setiap detik
Explanation
In a GLB (Gerak Lurus Beraturan) or Uniform Linear Motion, the change in velocity is constant every second. This means that the object's velocity remains the same throughout the motion and does not increase or decrease over time. The term "tetap setiap detik" refers to the constant velocity in GLB.

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• 9.

Seorang atlet ski meluncur lurus di atas salju dengan kelajuan konstan sebesar 20 m/s. Jenis gerak yang dilakukan atlet ski adalah gerak lurus  …

• A.

Beraturan

• B.

Dipercepat beraturan

• C.

Diperlambat beraturan

• D.

Tidak beraturan

A. Beraturan
Explanation
The athlete is skiing in a straight line with a constant speed of 20 m/s. This indicates that the motion of the athlete is uniform or regular. In uniform motion, the speed and direction of the object remains constant, which is the case here. Therefore, the correct answer is "beraturan" or uniform.

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• 10.

Tempelan kertas hasil percobaan gerak pada ticker timer dilukiskan seperti pada gambar berikut.Berdasarkan gambar tersebut dapat disimpulkan bahwa …

• A.

Benda bergerak lurus beraturan

• B.

Benda bergerak lurus berubah beraturan

• C.

Benda bergerak lurus berubah tak beraturan

• D.

Benda bergerak lurus tak beraturan

A. Benda bergerak lurus beraturan
Explanation
Based on the given image, the paper strips are evenly spaced, indicating that the object is moving with a constant velocity. This suggests that the object is undergoing uniform motion, which is characteristic of an object moving in a straight line with a constant speed. Therefore, the correct answer is "benda bergerak lurus beraturan" (object moving in a straight line with a constant velocity).

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• Mar 21, 2023
Quiz Edited by
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• Apr 15, 2016
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