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14. An unwary football player collides with a padded goalpost while running at a velocity of 8.10 m/s and comes to a full stop after

14.

An unwary football player collides with a padded goalpost while running at a velocity of 8.10 m/s and comes to a full stop after compressing the padding and his body 0.380 m.

(a)

What is his deceleration in m/s2? (Enter the magnitude.)

m/s2

(b)

How long in seconds does the collision last?

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