A jet plane lands with a speed of 81 m/s and can accelerate at a maximum rate of -5.60 m/s2 as it comes to rest.

A jet plane lands with a speed of 81 m/s and can accelerate at a maximum rate of -5.60 m/s2 as it comes to rest. (a) From the instant the plane touches the runway, what is the minimum time needed before it can come to rest? (b) Can this plane land on a small tropical island airport where the runway is 0.800 km long? What is the actual minimum distance needed to stop the plane?