For number 2, I cant seem to figure it out. Im using the equation from deltaKinetic Energy which is v=sq(2F)(dx)) The F for force I'm using is the spring constant x displacement which is 4886(.447). dx=.447. Take the sqroot of that and you get 44.18, but thats incorrect. I tried so many values that I lost track. Not really sure how I should go about this one?