Question

Какова масса винтовки в кг. если пуля массой 10г. вылетает из ствола со скоростью 600 м/с , а скорость отдачи 1,5 м/с

Answer 1

Система замкнута, значит выполняется ЗСИ:
                     m1V1-m2V2=0
                     m2= (m1*V1)/V2= (0.01*600)/1/5=4кг

Answer 2

Calculating the Mass of the Rifle

To calculate the mass of the rifle, we can use the principle of conservation of momentum. The momentum of the bullet leaving the rifle is equal to the momentum of the rifle in the opposite direction.

Given: - Mass of the bullet, m = 10 g = 0.01 kg - Velocity of the bullet, v = 600 m/s - Velocity of recoil, u = 1.5 m/s

Using the conservation of momentum formula: \[ m_{bullet} \times v_{bullet} = m_{rifle} \times u_{rifle} \]

\[ m_{rifle} = \frac{m_{bullet} \times v_{bullet}}{u_{rifle}} \]

Substitute the given values: \[ m_{rifle} = \frac{0.01 \, kg \times 600 \, m/s}{1.5 \, m/s} \]

\[ m_{rifle} = 4 \, kg \]

The mass of the rifle is 4 kg. [[2 #]]

This calculation assumes that the rifle and bullet are the only objects involved in the system and that no external forces act on them.