1. The problem statement, all variables and given/known data In a collision, an automobile initially traveling at 50 km/h decelerates at a constant rate of 200 m/s^2. A passenger not wearing a seat belt crashes against the dashboard. Before the collision, the distance between the passenger and the dashboard was 0.60 m. With what speed, relative to the automobile, does the passenger crash into the dashboard? Assume that the passenger has no deceleration before contact with the dashboard. initial velocity: 50 km/h= 13.89 m/s a= -200 m/s^2 x-x0= 0.60 m 2. Relevant equations x-x0= 1/2(v0+v)t a= (v^2-vo^2)/2(x-x0) 3. The attempt at a solution -200 m/s^2= (v^2-179.29 m^2/s^2)/1.2 m answer is supposed to be 15.5 m/s.