1. The problem statement, all variables and given/known data In a crash test a solid concrete wall is used to test crashworthiness. A particular SUV weighs 338.183 kg and is accelerated to 33.3485 m/s before colliding head on with the barrier. What impulse must be applied is required to stop the SUV? This gives Impulse = 11277.896 The struggle comes with this part: Through structural analysis of the SUV you ﬁnd out that 21801 N will destroy the engine block. If we ignore the friction between the car and the ground and assume the force the wall exerts a constant force on the car, What is the shortest collision time that will leave the engine block intact? Answer in units of s2. Relevant equations Impulse = net force * change in time p(f) = p(i) + Impulse 3. The attempt at a solution So I assumed that a force of 21800.9N force would mean that the engine is not broken. I do not know if this assumption holds. However, it seems to make sense in my mind. So i figured if the wall exerts a constant force of 11277.896N causing the car to have a momentum of 0; the change in time is: 21800.9N/11277.896N --> 1.933064465s But this is apparently wrong.