# The aircraft accelerating before takeoff, for a certain period of time moved uniformly.

The aircraft accelerating before takeoff, for a certain period of time moved uniformly. What was the acceleration of the aircraft, if in 30 seconds its speed increased from 10 to 55 m per second.

Given:

v1 = 10 m / s – initial airplane speed;

v2 = 55 m / s – final speed of the aircraft;

t = 30 seconds – the time interval during which the aircraft speed changed.

It is required to determine a (m / s ^ 2) – aircraft acceleration.

Since, according to the condition of the problem, the plane was moving uniformly accelerated (that is, its acceleration is constant in time and does not change), then:

a = (v2 – v1) / t = (55 – 10) / 30 = 45/30 = 1.5 m / s ^ 2.

Answer: the acceleration of an airplane is 1.5 meters per second squared.

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