Question

Поезд отощелот станции и первые 30 сек прошел 112,5м определить ускорениеи коечную скорость поезда

Answer 1

T=30с
S=112,5м
v₀==м/с
Найти:
a=?
v=?
Решение:
S=v₀t+at²/2, т.к v₀=0, то
2S=at²  ⇒   a= 2·112,5м/(30с)²=225м/900с²= 0,25м/с²
v=v₀+at  ⇒  v=at = 0,25м/с²· 30с = 7,5м/с
Ответ:   0,25м/с²; 7,5м/с.

Answer 2

Calculation of Acceleration and Final Velocity of the Train

To determine the acceleration and final velocity of the train, we can use the given information that the train traveled 112.5 meters in the first 30 seconds.

Let's start by calculating the acceleration of the train using the formula:

Acceleration (a) = Change in Velocity (Δv) / Time (t)

Since the train started from rest, the initial velocity (u) is 0 m/s. The final velocity (v) can be calculated using the formula:

Final Velocity (v) = Initial Velocity (u) + Acceleration (a) * Time (t)

Given: - Initial velocity (u) = 0 m/s - Distance traveled (s) = 112.5 m - Time (t) = 30 s

To find the acceleration, we need to calculate the change in velocity (Δv) using the formula:

Change in Velocity (Δv) = Final Velocity (v) - Initial Velocity (u)

Let's calculate the acceleration and final velocity of the train:

Step 1: Calculate the change in velocity (Δv): Δv = v - u

Step 2: Calculate the acceleration (a): a = Δv / t

Step 3: Calculate the final velocity (v): v = u + a * t

Step 1: Δv = v - u

Step 2: a = Δv / t

Step 3: v = u + a * t

Now let's substitute the given values into the formulas and calculate the acceleration and final velocity of the train.

Step 1: Δv = v - u = v - 0 = v

Step 2: a = Δv / t = v / t

Step 3: v = u + a * t = 0 + (v / t) * t = v

Since the given information does not provide the final velocity of the train, we cannot determine the acceleration or final velocity using the given data alone.

Please provide additional information or clarify the question if possible, so we can assist you further.