Momentum & Impuls 1

1. Sebuah benda bermassa 3 kg bergerak dengan kecepatan 4 m/s. Untuk menghentikan benda tersebut diperlukan impuls sebesar .................

1,5 Ns

3 Ns

6 Ns

12 Ns

15 Ns

To calculate the impulse required to stop an object, we can use the formula Impulse = Change in momentum. The momentum of an object is given by the product of its mass and velocity. In this case, the mass of the object is 3 kg and the velocity is 4 m/s. The initial momentum of the object is 3 kg * 4 m/s = 12 kg m/s. To bring the object to a stop, the final momentum should be zero. Therefore, the change in momentum is 12 kg m/s. Hence, the impulse required to stop the object is 12 Ns.

Explanation

To calculate the impulse required to stop an object, we can use the formula Impulse = Change in momentum. The momentum of an object is given by the product of its mass and velocity. In this case, the mass of the object is 3 kg and the velocity is 4 m/s. The initial momentum of the object is 3 kg * 4 m/s = 12 kg m/s. To bring the object to a stop, the final momentum should be zero. Therefore, the change in momentum is 12 kg m/s. Hence, the impulse required to stop the object is 12 Ns.

2. Momentum dapat dituliskan sebagai perkalian antara ....

M dan p

M dan I

M dan v

V dan I

M dan F

Momentum dapat dituliskan sebagai perkalian antara massa (m) dan kecepatan (v).

Explanation

Momentum dapat dituliskan sebagai perkalian antara massa (m) dan kecepatan (v).

3. 2. Sebuah mobil bermassa 700 kg bergerak dengan kecepatan 72 km/jam bergerak dengan kecepatan 72 km/jam. Momentum mobil tersebut adalah ..............

10000 kg m / s

11000 kg m/s

12000 kg m/s

13000 kg m/s

14000 kg m/s

The momentum of an object is calculated by multiplying its mass by its velocity. In this case, the mass of the car is given as 700 kg and the velocity is given as 72 km/h. To convert the velocity to m/s, we divide it by 3.6 (1 km/h = 0.2778 m/s). So, the velocity becomes 20 m/s. Multiplying the mass and velocity, we get 700 kg * 20 m/s = 14000 kg m/s. Therefore, the correct answer is 14000 kg m/s.

Explanation

The momentum of an object is calculated by multiplying its mass by its velocity. In this case, the mass of the car is given as 700 kg and the velocity is given as 72 km/h. To convert the velocity to m/s, we divide it by 3.6 (1 km/h = 0.2778 m/s). So, the velocity becomes 20 m/s. Multiplying the mass and velocity, we get 700 kg * 20 m/s = 14000 kg m/s. Therefore, the correct answer is 14000 kg m/s.

4. Sebuah mobil yang berlari cepat mempunyai momentum yang ................... dibandingkan dengan mobil yang lambat dengan massa yang sama

Beraturan

Tidak beraturan

Lebih besar

Lebih kecil

Kekal

A fast-moving car has a greater momentum compared to a slow-moving car with the same mass. Momentum is directly proportional to the velocity of an object. Since the fast car is moving at a higher velocity, its momentum will be greater than the slow car. Therefore, the correct answer is "lebih besar" which means "greater" in English.

Explanation

A fast-moving car has a greater momentum compared to a slow-moving car with the same mass. Momentum is directly proportional to the velocity of an object. Since the fast car is moving at a higher velocity, its momentum will be greater than the slow car. Therefore, the correct answer is "lebih besar" which means "greater" in English.

5. 1.Dari pernyataan berikut yang merupakan pengertian momentum yang benar adalah .............

Hasil perkalian massa dan percepatan suatu benda

Hasil perkalian antara gaya dan interval waktu selama gaya bekerja pada benda

Energi yang dimiliki oleh benda yang bergerak

Hasil perkalian kecepatan dan gaya yang bekerja pada suatu benda

Hasil perkalian massa dan kecepatan suatu benda

The correct answer is "hasil perkalian massa dan kecepatan suatu benda" because momentum is defined as the product of an object's mass and velocity.

Explanation

The correct answer is "hasil perkalian massa dan kecepatan suatu benda" because momentum is defined as the product of an object's mass and velocity.

6. Sebuah benda bermassa 500 gr bergerak dengan kelajuan 6 m/s, besar momentum benda tersebut adalah ...............

0,5 kg m/s

1 kg m/s

1,4 kg m.s

2,5 kg m/s

3 kg m/s

The momentum of an object is calculated by multiplying its mass by its velocity. In this case, the mass of the object is given as 500 grams, which is equal to 0.5 kilograms. The velocity of the object is given as 6 m/s. Therefore, the momentum of the object can be calculated as 0.5 kg * 6 m/s = 3 kg m/s.

Explanation

The momentum of an object is calculated by multiplying its mass by its velocity. In this case, the mass of the object is given as 500 grams, which is equal to 0.5 kilograms. The velocity of the object is given as 6 m/s. Therefore, the momentum of the object can be calculated as 0.5 kg * 6 m/s = 3 kg m/s.

7. Salah satu cara untuk merubah momentum benda adalah, kecuali ............

Dibutuhkan sebuah gaya untuk menaikkan momentum

Dibutuhkan sebuah gaya untuk menurunkan momentum

Merubah arahnya

Mengubah gaya yang bekerja padanya

Membutuhkan gaya

One way to change the momentum of an object is by changing its direction. When the direction of an object changes, its momentum also changes. This can be achieved by applying a force in a different direction, causing the object to change its path and thus altering its momentum.

Explanation

One way to change the momentum of an object is by changing its direction. When the direction of an object changes, its momentum also changes. This can be achieved by applying a force in a different direction, causing the object to change its path and thus altering its momentum.

8. Dimensi momentum atau impuls adalah ...................

M L T^-1

M L T^-2

M L^-1 T^-1

M L^-2 T

M L^2T^2

The correct answer is M L T^-1. This is because momentum or impulse is defined as the product of an object's mass and its velocity. The units for mass are M, and the units for velocity are L T^-1. Therefore, the units for momentum or impulse are M L T^-1.

Explanation

The correct answer is M L T^-1. This is because momentum or impulse is defined as the product of an object's mass and its velocity. The units for mass are M, and the units for velocity are L T^-1. Therefore, the units for momentum or impulse are M L T^-1.

9. Makin kecil momentum suatu benda makin ...............

Sulit untuk menghentikannya

Mudah untuk menghentikannya

Cepat pergerakannya

Lambat Pergerakannya

Besar impulsnya

The correct answer is "Mudah untuk menghentikannya" (Easy to stop it). This is because momentum is directly proportional to the mass and velocity of an object. When the momentum of an object is small, it means that either the mass or the velocity (or both) of the object is small. Therefore, it would be easier to stop the object as it would have less inertia and less resistance to changes in its motion.

Explanation

The correct answer is "Mudah untuk menghentikannya" (Easy to stop it). This is because momentum is directly proportional to the mass and velocity of an object. When the momentum of an object is small, it means that either the mass or the velocity (or both) of the object is small. Therefore, it would be easier to stop the object as it would have less inertia and less resistance to changes in its motion.

10. Dalam waktu 0,01 sekon sebuah benda mengalami perubahan momentum sebesar 4 kg m/s. Besar gaya yang mengakibatkan perubahan tersebut adalah ...........

0,04 N

0,4 N

4 N

40 N

400 N

The correct answer is 400 N. This is because the formula to calculate force is force = change in momentum / time. Given that the change in momentum is 4 kg m/s and the time is 0.01 seconds, we can calculate the force as 4 kg m/s / 0.01 s = 400 N.

Explanation

The correct answer is 400 N. This is because the formula to calculate force is force = change in momentum / time. Given that the change in momentum is 4 kg m/s and the time is 0.01 seconds, we can calculate the force as 4 kg m/s / 0.01 s = 400 N.