SOLUTION: An automibile engineer found that the impact of a truck colliding at 16 km/h with concrete pillar caused the bumper to indent only 6.4 cm. The truck stopped. Determine the accelera

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Question 896831: An automibile engineer found that the impact of a truck colliding at 16 km/h with concrete pillar caused the bumper to indent only 6.4 cm. The truck stopped. Determine the acceleration of the truck during the collision.
Answer by Alan3354(69443) About Me  (Show Source):
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An automibile engineer found that the impact of a truck colliding at 16 km/h with concrete pillar caused the bumper to indent only 6.4 cm. The truck stopped. Determine the acceleration of the truck during the collision.
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Indent = 6.4 cm = 0.064 meters
Assuming uniform acceleration, the average speed during the impact = 16/2 = 8 km/hr
d = r*t
t = d/r = 0.064/8 = 0.008 hr
a = 16/0.008 = 2000 km/hr/hr