Question

снаряд массой 2кг вылетает из ствола орудия горизонтально со скоростью 1000 м\с. Определите силу давления пороховых газов, считая её постоянной, если длина ствола равна 3.5м?,

Answer 1

$A=F\cdot l</p> <p> </p> <p>[tex]W=\frac{m\cdot v^{2}}{2}</p> <p> </p> <p>[tex]A=W$

 

$F=\frac{m\cdot v^{2}}{2L} = \frac{2\cdot 1000^{2}}{2\cdot 3.5} = 2.86\cdot 10^{5} H$

Answer 2

Calculation of Pressure Force

To determine the pressure force exerted by the propellant gases, we can use the principle of conservation of momentum. The momentum of the projectile before it is fired is equal to the momentum of the projectile after it is fired.

The momentum of an object is given by the product of its mass and velocity. In this case, the mass of the projectile is 2 kg and its velocity is 1000 m/s. Therefore, the initial momentum of the projectile is:

Initial momentum = mass × velocity = 2 kg × 1000 m/s = 2000 kg·m/s

Since the momentum is conserved, the final momentum of the projectile is also 2000 kg·m/s.

The final momentum of the projectile can be expressed as the product of its mass and final velocity. However, since the projectile is fired horizontally, the final velocity in the horizontal direction is zero. Therefore, the final momentum in the horizontal direction is also zero.

To achieve a final momentum of zero in the horizontal direction, an equal and opposite momentum must be imparted to the gun. This momentum is provided by the propellant gases pushing against the gun.

The force exerted by the propellant gases can be calculated using the formula:

Force = Change in momentum / Time

Since the change in momentum is 2000 kg·m/s and the time taken for the projectile to be fired is not given, we cannot calculate the exact force exerted by the propellant gases without this information.

However, we can provide a general formula for calculating the force exerted by the propellant gases:

Force = Pressure × Area

Where: - Pressure is the pressure of the propellant gases - Area is the cross-sectional area of the gun barrel

To calculate the pressure, we need to know the cross-sectional area of the gun barrel. Unfortunately, the cross-sectional area is not provided in the question.

Therefore, without the cross-sectional area of the gun barrel or the time taken for the projectile to be fired, we cannot determine the exact force exerted by the propellant gases.

Please provide the missing information so that we can calculate the force accurately.