The speed of the aircraft before landing is 220 km / h, determine the minimum length

The speed of the aircraft before landing is 220 km / h, determine the minimum length of the strip if the braking time should not exceed 1 minute.

Given:

v = 220 km / h = 61.1 m / s – aircraft speed before landing;

t = 1 minute = 60 seconds – aircraft deceleration time.

It is required to determine the length of the brake strip L (meter).

To determine the minimum length of the braking strip, you need to use the formula:

L = v * t – a * t ^ 2/2.

Taking into account that a = v / t, we get:

L = v * t – v * t ^ 2 / (2 * t);

L = v * t – v * t / 2;

L = v * t / 2 = 61.1 * 60/2 = 61.1 * 30 = 1833 meters (1.8 kilometers).

Answer: the minimum length of the braking strip must be equal to 1833 meters.