Posted by Gabby on Tuesday, February 5, 2008 at 6:52pm.
An airplane must achieve a velocity of 71 m/s to takeoff. If the runway is 1000 m long, at what speed must the plane constantly accelerate?
Can you show the formula for how you found the answer and explain how to do it.

Science calculations  drwls, Tuesday, February 5, 2008 at 7:27pm
The velocity achieved after going a distance X while accelerating at a rate a, from a standing start, is
V = sqrt (2 a X)
Rearrange that equaiton to arrive at the acceleration "a" needed to achieve velocity V at runway distance X:
2aX = V^2
a = V^2/(2X)
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