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Homework Statement
Currently i am studying two dimensional collisions. In order to find the impact velocity of a vehicle so i can determine the momentum and etc. I have inital velocity=130km/h, displacement (or the braking distance)=54.34m and the deceleration = 11.9812m/s/s. I need to find the time of the braking distance in order to find the impact velocity of the vehicle. Can anyone please help me do this?
Homework Equations
The Attempt at a Solution
I attempted using the equations of motion such as, v^2=u^2+2as and s=ut+1/2at^2 but they get me different answers and ridiculous answers that are greater than the initial velocity. I believe the impact velocity should be somewhere around 60-70km/h