1. The problem statement, all variables and given/known data A bolt is detached from the lower part of an elevator cabin that is ascending with velocity 6meters/second and for 3 seconds comes to the point from where the elevator started to ascend. Find: in which height is the end of the elevator in the moment when from it the bolt was detached. What is the velocity of the bolt when it comes to the point the elevator started to ascend. 2. Relevant equations h=v0t+(gt^2)/2 v^2-v0^2=2gs 3. The attempt at a solution Here's what i did:h=v0t+(gt^2)/2 vo is the first velocity h=18+(10*9)/2=63 v^2-v0^2=2gs v^2=2gs+vo^2=2*10*63+36 v=36 But my teacher told me that I did it wrong, because the bolt firstly goes up (maybe after it is detached from the elevator) and then goes down. Could you correct my mistake?