Question

Ребята,кто шарит за физику прошу меня помочь Задача.Вагон массой 17 тон движется со скоростью 2 м\с,автоматически на ходу сцепляется с неподвижным вагоном массой 34 тонны.С какой скоростью вдижется сцепка?Сможет ли первый вагон сдвинуть второй?Учитель сам ее сделал(как она сказала)

Answer 1

Ответ:

короче так если 17÷2=8,5

а 34÷8,5=4 вроде так.кажется 1 вагон не сможет сдвинуть 2 вагон даже не в курсе

не блогадари

Answer 2

Problem Analysis

We have a train consisting of two wagons. The first wagon has a mass of 17 tons and is moving with a velocity of 2 m/s. It automatically couples with a stationary second wagon with a mass of 34 tons. We need to find the velocity of the coupled wagons and determine if the first wagon can move the second wagon.

Solution

To solve this problem, we can apply the principle of conservation of momentum. According to this principle, the total momentum before the coupling is equal to the total momentum after the coupling.

The momentum of an object is given by the product of its mass and velocity. Mathematically, momentum (p) is defined as:

p = m * v

where: - p is the momentum, - m is the mass of the object, and - v is the velocity of the object.

Before the coupling, the momentum of the first wagon is given by:

p1 = m1 * v1

where: - m1 is the mass of the first wagon (17 tons), and - v1 is the velocity of the first wagon (2 m/s).

The momentum of the second wagon is zero since it is stationary.

After the coupling, the total momentum of the coupled wagons is given by:

p_total = (m1 + m2) * v_total

where: - m2 is the mass of the second wagon (34 tons), and - v_total is the velocity of the coupled wagons.

According to the principle of conservation of momentum, we can equate the total momentum before the coupling to the total momentum after the coupling:

p1 = p_total

Substituting the values, we have:

m1 * v1 = (m1 + m2) * v_total

Simplifying the equation, we can solve for v_total:

v_total = (m1 * v1) / (m1 + m2)

Let's calculate the value of v_total.

Calculation

Given: - m1 = 17 tons - v1 = 2 m/s - m2 = 34 tons

Substituting the values into the equation, we have:

v_total = (17 * 2) / (17 + 34)

Calculating the value, we find:

v_total = 34 / 51 ≈ 0.67 m/s

Therefore, the velocity of the coupled wagons is approximately 0.67 m/s.

To determine if the first wagon can move the second wagon, we need to compare the force exerted by the first wagon with the force required to move the second wagon. Since we don't have information about the force, we cannot determine if the first wagon can move the second wagon based solely on the given information.

Conclusion

The velocity of the coupled wagons is approximately 0.67 m/s. However, we cannot determine if the first wagon can move the second wagon based solely on the given information.