1. The problem statement, all variables and given/known data a muon moving in a straight line enters a region w/ speed of 5 x 10^6 m/s. it then slowed down at a rate of 1.25 m/s^2. how far does the muon take to stop?? 2. Relevant equations 2ad + square of initial velocity = square of final velocity 3. The attempt at a solution my answer was 1 x 10 ^13 m.... i substituted the given (acceleration, initial velocity, and the final velocity which is 0) to the equation, then i got that displacement... my prof told me that the answer must be 0.1 m,, i don't know why,,, is it something about the behavior of muon?? or if isn't,, is there something wrong in the given?? thx ,,, i really need this asap... thx again!