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

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

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.

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.

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.

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.

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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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.

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.

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).

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.

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.

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.

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).

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.