- #1
Jason17
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Homework Statement
An aircraft of mass 5.8 x 10^4 kg stands at the end of the runway ready for take-off. The engines provide a constant total thrust of 2.1 x 10^5N
i)Calculate the initial acceleration in ms-2 of the aircraft as it starts to move
ii) Calculate the length in m of runway needed for the aircraft to reach its take off speed of 85 ms-1 , assuming acceleration is constant
Homework Equations
Motion Equations
v = u + at
s = (u + v)/2 * t
s = ut + 1/2*at^2
The Attempt at a Solution
The answer is 3.6ms to part i) but i can't seem to get anywhere near that.
I really don't know where to start.
Do i square both numbers and square root it? I just need a guide to lead me what info i have and what info i need.
thank you