- #1

physicsnnewbie

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## Homework Statement

The landing velocity of an airplane (i.e., the velocity at which it touches the ground) is 100 mi/hr. It decelerates at a constant rate and comes to a stop after traveling 1/4 mile along a straight landing strip. Find the deceleration or negative acceleration.

## Homework Equations

## The Attempt at a Solution

a = x

v = xt + C

v = xt + 100

s = (x/2)t^2 + 100t + C

1/4 = (x/2)t^2 +100t

I'm not sure what to do next.