A certain aircraft has a liftoff speed of 124 kmh What minim

A certain aircraft has a liftoff speed of 124 km/h What minimum constant acceleration does the aircraft does the aircraft require if it is to be airborne after a takeoff run of 206 m? m/s^2 How long does it takes the aircraft to become airborne? s

Solution

equaltion of ;inear motion: v^2 = u^2 -2as

wher v ----final vel ; u ---intial vel; a --- constant acc. s ---distance

124 km/hr ---- 124*5/18 = 34.33 m/se

a)     a = ( v^2 - u^2)/2s = ( 34.44^2 -0)/(2*206)

= 2.86 mt/sec^2

b)     Using v = u +at

t = ( v-u)/a = ( 34.44 -0)/2.86 = 12.04 sec