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An airplane travels 280m down the runway before taking off. If it starts from rest, moves with constant acceleration, and becomes airborne in 8.00 s, what is its speed, in m/s, when it takes off?

Respuesta :

26zehenderm32

Answer:

the average speed is ... 280 m / 8.00 s = 35 m/s

the initial speed is zero (rest), so the final speed (take off) is

... ave = (init + fin) / 2 ... 35 = (0 + f) / 2 ... f = 70 m/s

Explanation: