Posted by **Geri** on Wednesday, December 8, 2010 at 11:21am.

a jetliner traveling northward is landing with a speed of 80 m/s. Once the jet touches down, it has 800 m of runway in which to reduce its speed to 10 m/s. (a) Compute the average acceleration (magnitude and direction) of the plane during landing (take the direction of the plane's motion as positive). (b) How long a runway does the jetliner need to stop?

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