1- a truck covers 40.0 m in 8.50s while uniformly decelerating to a final velocity of 3.0m/s a- find the trucks original speed and B-find its acceleration.

2- a jet plane lands with a speed of 100m/s and decelateres at a rate of 4.50m/s^2 as it comes to a rest. a- from the instant the plane touches the run way , 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 0.850km long?

3- you drop a rock into well and see it splash 2.5 s later . how deep is the well ?