Lais. / S24. Starting from rest, an aeroplane takes off after covering

1.	Lais. / S24. Starting from rest, an aeroplane takes off after covering 0.7km on the runway. If it takes off at 35 ms-1, calculate (a) theacceleration (b) time for which it moves on the runway.Ans, (a) 0-875 m s-2: (h) 40 sl
Answer» Explanation: initial VELOCITY , u = 0m/s final velocity. , v. = 35m/s distance. , s = 0.7km = 0.7×1000 = 700m acceleration , a. = ? v^2 = u^2 + 2as 35^2 = 0^2 + 2×a×700 1225. = 1400a 1225/1400 = a 0.875m/s^2 =a time , t = ? s = ut +1/2 at^2 700. = 0×t + 1/2×0.875×t^2 700. = 0.4375t^2 700/0.4375 = t^2 1600. = t^2 40^2 = t^2 40 SEC = t

Lais. / S24. Starting from rest, an aeroplane takes off after covering 0.7km on the runway. If it takes off at 35 ms-1, calculate (a) theacceleration (b) time for which it moves on the runway.Ans, (a) 0-875 m s-2: (h) 40 sl

Answer»

Explanation:

initial VELOCITY , u = 0m/s

final velocity. , v. = 35m/s

distance. , s = 0.7km

= 0.7×1000

= 700m

acceleration , a. = ?

v^2 = u^2 + 2as

35^2 = 0^2 + 2×a×700

1225. = 1400a

1225/1400 = a

0.875m/s^2 =a

time , t = ?

s = ut +1/2 at^2

700. = 0×t + 1/2×0.875×t^2

700. = 0.4375t^2

700/0.4375 = t^2

1600. = t^2

40^2 = t^2

40 SEC = t

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Lais. / S24. Starting from rest, an aeroplane takes off after covering 0.7km on the runway. If it takes off at 35 ms-1, calculate (a) theacceleration (b) time for which it moves on the runway.Ans, (a) 0-875 m s-2: (h) 40 sl​

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Lais. / S24. Starting from rest, an aeroplane takes off after covering 0.7km on the runway. If it takes off at 35 ms-1, calculate (a) theacceleration (b) time for which it moves on the runway.Ans, (a) 0-875 m s-2: (h) 40 sl