Question

U - 715 м/c S - 41.5 см U0 = 0 Найти: a - ? t - ?

Answer 1

движение равноускоренное

средняя скорость движения Vcp = 715 м.с /2 =357,5 м/с

Длина ствола L=41.5 см =0.415 м

время движения в стволе t =L /Vcp =0.415 /357,5 =0.001160 c= 1.16 мс

ускорение a = V / t =715 м.с / 0.001160 c = 616379.3 м/с2 =616 км.с(в кв)

 

ответ :616 км.с(в кв) и 1.16 мс

Answer 2

Problem Statement

You have provided the following information: - U = -715 m/s - S = 41.5 cm - U0 = 0

You want to find the values of acceleration (a) and time (t).

Solution

To find the values of acceleration (a) and time (t), we can use the equations of motion. The equation that relates initial velocity (U0), final velocity (U), acceleration (a), displacement (S), and time (t) is:

U^2 = U0^2 + 2aS (Equation 1)

We are given the values of U, S, and U0. Let's substitute these values into Equation 1 and solve for a.

Substituting the given values: (-715 m/s)^2 = (0)^2 + 2a(41.5 cm)

Converting the units: (-715)^2 = 2a(0.415) (1 m = 100 cm)

Simplifying the equation: 510,225 = 0.83a

Now, let's solve for a: a = 510,225 / 0.83

Using a calculator, we find that: a ≈ 615,542.17 m/s^2

Now that we have found the value of acceleration (a), let's find the value of time (t). We can use the equation:

U = U0 + at (Equation 2)

Substituting the given values: -715 m/s = 0 + (615,542.17 m/s^2)t

Simplifying the equation: -715 = 615,542.17t

Now, let's solve for t: t = -715 / 615,542.17

Using a calculator, we find that: t ≈ -0.00116 seconds

Conclusion

Based on the given information, the value of acceleration (a) is approximately 615,542.17 m/s^2 and the value of time (t) is approximately -0.00116 seconds.