(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A jet plane lands with a velocity of +100 m/s and can accelerate at a maximum rate of -5.0 m/s^{2}as it comes to rest. Can this plane land at an airport where the runway is 800 meters long?

[tex]v_i = +100 m/s[/tex]

[tex]a = -5.0 m/s^2[/tex]

2. Relevant equations

The only equations in the chapter are as follows, but I don't think either can help me:

[tex]a_{avg} = \frac{\Delta x}{\Delta t}[/tex]

[tex]\Delta x = \frac{1}{2}(v_i +v_f)\Delta t[/tex]

3. The attempt at a solution

I have attempted the following, but the answer does not seem to make any sense to me, since I need a distance and not a time.

[tex]\frac{+100 m/s}{-5.0 m/s^2} = -20 s[/tex]

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# Homework Help: Disp. with Constant Accel. Formula Help

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