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Ответ:
81.8 m/s
Explanation:
The initial velocity of the plane is:
So, decomposing along the x- and y- directions:
(we took east as positive x-direction and north as positive y-direction)
The acceleration is
Decomposing it along the two directions:
So the two components of the velocity after a time t = 25.0 s will be
So, the magnitude of the velocity of the plane will be