his is an interesting problem because you can infer so much from just two

numbers. An airplane lands on a runway, and using its brakes it slows with

uniform acceleration such that $25$ seconds later it stops $1000$m from where it

started braking.

$($a$)$ What was the average speed over the $25$ seconds, in units of both meters

per second $($m$/$s$)$ and miles per hour $($mph$)?$

$($b$)$ What was the acceleration, in units of m$/$s$2?$

$($c$)$ What was the speed of the airplane when it first touched the runway?