Question

Пуля массой 8г, летящая со скоростью 780 м/с горизонтально, попадает в мешок с песком, лежащим на гладком столе, и застревает в нём. Масса мешка 7 кг. С какой скоростью начинает скользить мешок?

Answer 1

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Answer 2

Calculation of the Initial Velocity of the Bullet

To determine the initial velocity of the bullet, we can use the principle of conservation of momentum. The momentum before the bullet hits the sandbag is equal to the momentum after it gets embedded in the sandbag.

The momentum of an object is given by the product of its mass and velocity. Let's denote the mass of the bullet as m_bullet and its initial velocity as v_bullet. The mass of the sandbag is denoted as m_sandbag.

According to the conservation of momentum, we have:

m_bullet * v_bullet = (m_bullet + m_sandbag) * v_final

Since the bullet comes to rest after getting embedded in the sandbag, the final velocity (v_final) of the bullet-sandbag system is zero.

Therefore, we can rewrite the equation as:

m_bullet * v_bullet = (m_bullet + m_sandbag) * 0

Simplifying the equation, we find:

v_bullet = 0

This means that the initial velocity of the bullet is zero. However, this seems unlikely given the scenario you described. It's possible that there might be missing information or an error in the question.

Please provide any additional information or clarify the scenario if possible, and I'll be happy to assist you further.