College Physics by Openstax Problem 2.33

An unwary football player collides with a padded goalpost while running at a velocity of 7.50 m/s and comes to a full stop after compressing the padding and his body 0.350 m.

a) What is his deceleration?

b) How long does the collision last?


Part a

a=\frac{v^2-v_0^2}{2\Delta x}



Part b

t=\frac{2\Delta x}{v+v_0}


t=9.33\times 10^{-2}\:s

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