PhyFl18-2.5.32 Even though the average acceleration vs. time is a gross approximation of the true instantaneous acceleration, we can still use the approximation to accurately determine the final velocity AND the length of the barrel. Wow, this Physics stuff is pretty cool. Knowing a little bit about the acceleration of a bullet in a barrel tells me how long the barrel is. Magic? Nope, physics with a little calculus.

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