anonymous
  • anonymous
A plane accelerates from rest at a constant rate of 5.00 m/s^2 along a runway that is 1800 m long. Assume that the plane reaches the required takeoff velocity at the end of the runway. What is the time needed to take off?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
i got 134.16 sec??
anonymous
  • anonymous
oops never mind :)
anonymous
  • anonymous
I think you take 1800/5 to see how many 5m are in the 1800m which is 360 so it would take 360 (5m) to get to 1800 so s^2 = 360 square root both sides about 18.97 seconds... Not sure though

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anonymous
  • anonymous
s = ut + (1/2)at^2 => 1800 = 0t + (5/2) t^2 => t^2 = 3600/5 =>t = sqrt(3600/5) = sqrt(720) = 12sqrt(5)
anonymous
  • anonymous
nice thanks Guys!

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