Correct answer
In general, injury risk and severity increase.
In general it increases injury risk and severity because more energy must be dissipated. At the same mass, kinetic energy is proportional to speed squared; doubling speed quadruples energy, not necessarily each particular injury. Outcomes also depend on collision type, vehicle deformation, restraints and the people involved. The relationship is not limited to pedestrian collisions and does not guarantee a particular injury in each crash.
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In general, injury risk and severity increase.
It only affects injuries in pedestrian collisions.
There is no relationship between impact speed and bodily injury.
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