Question

Самолёт готовится совершить посадку на аэродроме. Шасси самолета касаются посадочной полосы при скорости 252 км/ч, и через 25 с. самолет останавливается. Определи длину тормозного пути самолёта. Движение самолета по полосе считать равнозамедленным

Answer 1

Дано:

v0 = 252км/ч = 70м/с

v = 0

t = 25с

s - ?

Решение:

a = (v-v0)/t = (-70м/с)/25с = -2,8м/с²

s = v0t + (at²)/2 = 70м/с•25с + (-2,8м/с²•(25с)²)/2 = 1750м - 875м = 875м

Ответ: 875м

Answer 2

Calculation of the Braking Distance of an Airplane

To determine the braking distance of an airplane, we need to consider the initial speed of the airplane, the time it takes to stop, and assume that the deceleration is constant.

Given: - Initial speed of the airplane: 252 km/h - Time taken to stop: 25 seconds

To calculate the braking distance, we can use the formula:

Braking Distance = Initial Speed * Time + (1/2) * Acceleration * Time^2

Since the deceleration is constant, we can calculate the acceleration using the formula:

Acceleration = Change in Speed / Time

In this case, the change in speed is the initial speed, as the airplane needs to come to a complete stop.

Let's calculate the braking distance step by step:

1. Convert the initial speed from km/h to m/s: - 252 km/h = 252 * (1000 m / 3600 s) = 70 m/s

2. Calculate the acceleration: - Acceleration = Change in Speed / Time - Acceleration = 70 m/s / 25 s = 2.8 m/s^2

3. Calculate the braking distance: - Braking Distance = Initial Speed * Time + (1/2) * Acceleration * Time^2 - Braking Distance = 70 m/s * 25 s + (1/2) * 2.8 m/s^2 * (25 s)^2 - Braking Distance = 1750 m + 0.5 * 2.8 m/s^2 * 625 s^2 - Braking Distance = 1750 m + 875 m - Braking Distance = 2625 m

Therefore, the braking distance of the airplane is 2625 meters.

Please note that this calculation assumes that the deceleration is constant and the airplane moves in a straight line during the braking process. In reality, various factors such as wind resistance, runway conditions, and braking system efficiency can affect the actual braking distance of an airplane.