Remedial Fisika Kelas X

The correct answer is m/s and m/s2. In the International System of Units (SI), the unit for velocity (speed) is meters per second (m/s) and the unit for acceleration is meters per second squared (m/s2). This means that velocity is measured in meters per second and acceleration is measured in meters per second squared.

The time taken for the car to come to a stop can be calculated using the equation:
time = (final velocity - initial velocity) / acceleration.
In this case, the initial velocity is 20 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 it is deceleration).
Plugging in these values, we get:
time = (0 - 20) / -5 = 4 seconds.
Therefore, the correct answer is 4.

Batu dilempar ke atas dianggap sebagai gerak lurus diperlambat karena ketika batu dilempar ke atas, gaya gravitasi menarik batu ke bawah sehingga melambatkan kecepatan batu tersebut.

The correct answer is 1 and 3 because the table shows that the correct combination of base quantity, measuring instrument, and unit in the International System of Units (SI) is for mass (kg) to be measured using a beam balance and for time (s) to be measured using a stopwatch.

The given answer is correct because kecepatan (velocity), percepatan (acceleration), and gaya (force) are all examples of derived quantities. Derived quantities are those that are derived from the combination of base quantities, such as length, time, and mass. Kecepatan is derived by dividing distance by time, percepatan is derived by dividing change in velocity by time, and gaya is derived by multiplying mass and acceleration. Therefore, these three quantities belong to the group of derived quantities.

The correct answer is "Meteorit jatuh ke bumi." This is considered as accelerated linear motion because the meteorite is falling towards the Earth due to the force of gravity. As it falls, its speed increases, indicating acceleration.

The time it takes for an object to fall freely from a certain height can be calculated using the equation t = √(2h/g), where t is the time, h is the height, and g is the acceleration due to gravity. In this case, the height is 20m and the acceleration due to gravity is 10m/s^2. Plugging these values into the equation, we get t = √(2(20)/10) = √(4) = 2 seconds. Therefore, it takes 2 seconds for the coconut to reach the ground.

The correct answer is "Kuat arus, intensitas cahaya, suhu, waktu". This is because these four quantities (electric current, light intensity, temperature, and time) are considered fundamental or base quantities in the International System of Units (SI). Base quantities are independent and cannot be defined in terms of other quantities. They form the foundation for deriving other quantities in the SI system.

Andi berangkat pukul 07.00 dan memiliki jarak 10 km untuk mencapai sekolah. Dalam satu jam, motor Andi dapat menempuh jarak 40 km. Oleh karena itu, Andi akan tiba di sekolah setelah 15 menit (10 km / 40 km/jam * 60 menit). Jadi, Andi akan tiba di sekolah pukul 07.15.

The given information states that a bicycle accelerates from rest to a speed of 10 m/s and covers a distance of 40 m. To find the acceleration, we can use the equation of motion:

v^2 = u^2 + 2as

where v is the final velocity (10 m/s), u is the initial velocity (0 m/s), a is the acceleration, and s is the distance (40 m).

Plugging in the values, we get:

(10 m/s)^2 = (0 m/s)^2 + 2a(40 m)

100 m^2/s^2 = 0 + 80a

100 m^2/s^2 = 80a

Dividing both sides by 80, we find:

a = 100 m^2/s^2 / 80 = 1.25 m/s^2

Therefore, the acceleration experienced by the bicycle is 1.25 m/s^2.

The correct answer is 2 N kearah gaya 6 N. This means that the resultant of the two forces is 2 N in the direction of the 6 N force. The two forces have opposite directions, so they will cancel each other out to some extent. The resultant force will be in the direction of the larger force, which is 6 N. The magnitude of the resultant force can be found by subtracting the smaller force from the larger force, which gives us 6 N - 4 N = 2 N. Therefore, the resultant of the two forces is 2 N in the direction of the 6 N force.

The length and width of the rectangular land are given as 15.35 m and 12.5 m respectively. To find the area of the land, we multiply the length and width. When we multiply 15.35 m and 12.5 m, we get 191.875 m2. According to the rules of significant figures, we round this value to the nearest whole number, which is 192. Therefore, the correct answer is 192.

The average acceleration of the train can be calculated using the formula: average acceleration = (final velocity - initial velocity) / time. In this case, the initial velocity is 10 m/s, the final velocity is 20 m/s, and the time is 20 seconds. Plugging in these values into the formula, we get (20 m/s - 10 m/s) / 20 s = 10 m/s / 20 s = 0.5 m/s^2. Therefore, the correct answer is 0.5.

The correct answer is "Kecepatan, perpindahan, percepatan." Kecepatan, perpindahan, and percepatan are all vector quantities because they have both magnitude and direction. Kecepatan (velocity) is the rate of change of displacement with respect to time, perpindahan (displacement) is the change in position of an object, and percepatan (acceleration) is the rate of change of velocity with respect to time. These quantities require both a numerical value and a direction to fully describe them, making them vector quantities.

Given that the resultant of two perpendicular vectors is 10 N and one of the vectors is 6 N, we can use the Pythagorean theorem to find the magnitude of the other vector. The Pythagorean theorem states that the square of the hypotenuse (resultant) is equal to the sum of the squares of the other two sides (vectors). So, using this theorem, we can calculate the magnitude of the other vector as follows: 10^2 = 6^2 + x^2, where x is the magnitude of the other vector. Solving this equation, we get x^2 = 100 - 36 = 64. Taking the square root of both sides, we find that x = 8 N. Therefore, the magnitude of the other vector is 8 N.

The correct answer is 0 m. This is because the question states that Richard swam 50 m in one direction and then returned to his starting position. Therefore, his total displacement is 0 m, as he ended up back where he started.

The correct answer is "Jarak, waktu, luas" because scalar quantities are those that have only magnitude and no direction. Distance (jarak) and time (waktu) are scalar quantities as they can be measured without any reference to direction. Area (luas) is also a scalar quantity as it represents the size of a two-dimensional surface and does not have any direction associated with it.

The resultant of two perpendicular vectors can be found using the Pythagorean theorem. The magnitude of the resultant vector is given by the square root of the sum of the squares of the individual vector magnitudes. In this case, the magnitude of the first vector is 4 N and the magnitude of the second vector is 3 N. Using the Pythagorean theorem, the magnitude of the resultant vector is √(4^2 + 3^2) = √(16 + 9) = √25 = 5 N.

The given vektor has a magnitude of 12 N and forms a 30-degree angle with the horizontal axis. To find the x-component and y-component of the vector, we can use trigonometry. The x-component is found by multiplying the magnitude by the cosine of the angle, which gives us Fx = 12 N * cos(30°) = 6√3 N. The y-component is found by multiplying the magnitude by the sine of the angle, which gives us Fy = 12 N * sin(30°) = 6 N. Therefore, the correct answer is Fx = 6√3 N and Fy = 6 N.

Purnomo is running at a speed of 9.4 m/s and is 2 m behind Mardi. It takes him 10 seconds to catch up to Mardi. Therefore, to calculate Purnomo's speed, we can use the formula: speed = distance/time. Purnomo covers a distance of 2 m in 10 seconds to catch up to Mardi. So, his speed is 2/10 = 0.2 m/s. Therefore, Purnomo's speed is 9.4 m/s + 0.2 m/s = 9.0 m/s.