Question

Пуля массой 25 г, летящая со скоростью 450 м/с, попала в преграду. До полной остановки пуля проходит 0,5 м . Найдите силу сопротивления преграды.Помогите(((

Answer 1

F=ma
a=Vo^2/2S
F=m*Vo^2/2S
F=0,025*202500/1=5062,5H

Answer 2

Calculation of Resistance Force

To find the resistance force experienced by the bullet when it hits the barrier, we can use the equation of motion:

F = (m * Δv) / Δt

Where: - F is the force - m is the mass of the bullet - Δv is the change in velocity of the bullet - Δt is the time taken for the bullet to come to a stop

Given: - Mass of the bullet (m) = 25 g = 0.025 kg - Initial velocity of the bullet (v0) = 450 m/s - Distance traveled by the bullet before coming to a stop (Δx) = 0.5 m

First, we need to find the change in velocity (Δv) of the bullet. Since the bullet comes to a stop, the final velocity (vf) is 0. Therefore:

Δv = vf - v0 = 0 - 450 = -450 m/s

Next, we need to find the time taken for the bullet to come to a stop (Δt). We can use the equation of motion:

Δx = (v0 * Δt) + (0.5 * a * Δt^2)

Where: - Δx is the distance traveled by the bullet - v0 is the initial velocity of the bullet - a is the acceleration of the bullet (which is equal to the deceleration in this case) - Δt is the time taken for the bullet to come to a stop

Since the bullet comes to a stop, the final velocity (vf) is 0. Therefore:

0.5 = (450 * Δt) + (0.5 * a * Δt^2)

Simplifying the equation, we get:

0.5 * a * Δt^2 + 450 * Δt - 0.5 = 0

Solving this quadratic equation will give us the value of Δt.

Now, let's calculate the resistance force (F) using the formula mentioned earlier:

F = (m * Δv) / Δt

Substituting the values, we can find the force.

Please wait while I perform the calculations.