Straight Motion For Grade 7

Explanation
The correct answer is "Sepatu diam terhadap Yoga". This means that the shoes are stationary or not moving in relation to Yoga. The sentence implies that Yoga is the one who is moving around the field while wearing the shoes.

Explanation
The resulting pattern on the ticker tape shows a series of equally spaced dots, indicating that the body is moving with a constant acceleration. This means that its velocity is changing at a constant rate over time. If the body was moving with uniform motion, the dots on the ticker tape would be equally spaced but with no change in velocity. If the body was moving with uniformly decelerated motion, the dots would be spaced closer together over time. Therefore, the correct answer is uniformly accelerated motion.

Explanation
Daniel Pedrosa mengendarai sepeda motor ke arah barat sejauh 20 km, kemudian berbalik arah ke timur sejauh 12 km. Jadi, perpindahan yang ditempuh Daniel Pedrosa adalah 8 km ke arah barat. Ini dapat dihitung dengan mengurangi jarak yang ditempuh ke arah timur (12 km) dari jarak yang ditempuh ke arah barat (20 km), sehingga 20 km - 12 km = 8 km.

Explanation
The graph shows a straight horizontal line, indicating that the velocity of the car is constant. Since the graph does not show any change in velocity, it can be concluded that the speed of the car is 1 m/s.

Explanation
The acceleration of the car can be calculated using the formula: acceleration = (final velocity - initial velocity) / time. In this case, the final velocity is 60 m/s, the initial velocity is 20 m/s, and the time is 5 seconds. Plugging in these values into the formula, we get: acceleration = (60 m/s - 20 m/s) / 5 seconds = 8 m/s². Therefore, the acceleration of the car is 8 m/s².

Explanation
The picture shows a graph with a straight line that slopes downward from left to right. This indicates that the object's velocity is decreasing at a constant rate over time. Therefore, the motion can be described as uniformly decelerated.

Explanation
Wima berangkat pada pukul 09.00 WIB dan kecepatan rata-ratanya adalah 20 km/jam. Jarak antara rumah Wima dan Dhiva adalah 5 km. Untuk menentukan waktu yang dibutuhkan oleh Wima untuk tiba di rumah Dhiva, kita dapat menggunakan rumus waktu yang ditempuh = jarak / kecepatan. Dalam hal ini, waktu yang dibutuhkan = 5 km / 20 km/jam = 0.25 jam = 15 menit. Jadi, Wima akan tiba di rumah Dhiva pada pukul 09.15 WIB.

Explanation
The correct answer is 1 dan 3 because both statement 1 (Bola yang jatuh bebas ke tanah) and statement 3 (Bola menuruni bidang miring) describe objects undergoing motion that can be categorized as "gerak lurus berubah beraturan dipercepat" or "uniformly accelerated rectilinear motion". In both cases, the objects are experiencing acceleration due to the force of gravity. In statement 1, the ball is falling freely towards the ground, while in statement 3, the ball is rolling down a sloping surface.

Explanation
The correct answer is 0,5. The explanation for this answer is that the question states that the car stops after 20 seconds. To find the acceleration, we can use the formula a = (vf - vi) / t, where vf is the final velocity, vi is the initial velocity, and t is the time taken. In this case, the initial velocity is 10 m/s, the final velocity is 0 m/s (since the car stops), and the time taken is 20 seconds. Plugging these values into the formula, we get a = (0 - 10) / 20 = -10/20 = -0.5 m/s^2. Since acceleration is defined as a positive value, the acceleration is 0.5 m/s^2.