physics
posted by elana .
A 747 jet, travelling at a speed of 70 m/s, touches down on a runway. The jet slows to rest at the rate of 2.0 m/s^2. Calculate the total distance the jet travels on the runway as it is brought to rest.

Vf^2=vi^2+2ad solve for d

but qhats thhe Vf in the problem

Vf= final velocity
Vi= initial velocity 
i knoww but how do u find out what tge final velocity is in this problem

What does "to rest" mean? What velocity is "at rest"?

1200m
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