Asked by Anonymous
                Using the equation for Impulse, can you explain the following: 
Why are car steering rods designed to collapse?
Why are highway guard rails designed to crumple up on impact?
            
        Why are car steering rods designed to collapse?
Why are highway guard rails designed to crumple up on impact?
Answers
                    Answered by
            Damon
            
    Force = rate of change of momentum
force * time = change of momentum = impulse
if we have mass m moving at speed v, momentum m v and have to stop it with minimal force, we do it over a longer time.
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