An aircraft heading north lands at a speed of 250 km / h. Once the aircraft touches, it travels 750 m to reduce its speed to 22 km / h. a) Calculate the average acceleration of the aircraft during landing. b) How long does it take to slow down the aircraft?
Data:
v = 250 km/h
u = 22 km/h
x = 750 m
Transform:
750m * (1km/1000m) = 0.75 km
a)
v2 = u2 + 2ax
(v2 - u2)/ 2x = a
(222 - 2502)/ 2(0.75) = a
a = -41344
b)
v = u + at
(v - u)/ a = t
(22 - 250)/ (-41344) = t
t = 5.51*10-3 s
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