Question

Охотник произвёл выстрел из ружья масса пули равна 20 г масса ружья 10 кг. Скорость пули, после выстрела равна 500 м/с. Какую скорость приобрело ружьё?

Answer 1

Никакую, ружье останется неподвижным.

Answer 2

Calculation of Rifle's Velocity After Firing

To calculate the velocity acquired by the rifle after firing, we can use the principle of conservation of momentum. The momentum of the bullet before firing is equal to the momentum of the bullet and the rifle after firing.

Given: - Mass of the bullet, m_bullet = 20 g = 0.02 kg - Mass of the rifle, m_rifle = 10 kg - Velocity of the bullet after firing, v_bullet = 500 m/s

Using the conservation of momentum formula: \[ m_{\text{bullet}} \times v_{\text{bullet}} = (m_{\text{bullet}} + m_{\text{rifle}}) \times v_{\text{final}} \]

We can solve for the final velocity of the rifle, \( v_{\text{final}} \).

Calculation

\[ 0.02 \, \text{kg} \times 500 \, \text{m/s} = (0.02 \, \text{kg} + 10 \, \text{kg}) \times v_{\text{final}} \]

\[ 10 \, \text{kg} \times 500 \, \text{m/s} = 10.02 \, \text{kg} \times v_{\text{final}} \]

\[ v_{\text{final}} = \frac{10 \times 500}{10.02} \, \text{m/s} \]

Answer

The velocity acquired by the rifle after firing is approximately 499.00 m/s.