How Much Does a Fly Hitting a Train Slow It Down?

Mathematics, Physics
[caption id="attachment_27068" align="alignright" width="480"] The Scenario: a fly hitting a train.[/caption]Say you have a train, a locomotive traveling along a straight railroad track. The atmosphere is absolutely free of every conceivable impediment except for one lone housefly. Unfortunately (for the fly), it and the train collide head-on. You have a fly hitting a train. Clearly, the fly will turn into a smear. How much does that fly slow the train down that it has hit? The train will suffer no apparent change in speed, yet it does slow down, even if there is no obvious change. How much does it slow down? Fly Hitting a Train: Specific Numbers We will attempt to use realistic numbers. We choose the following: Locomotive: 4,000 tons [a light train] Fly: 14 milligrams Locomotive Speed:…
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A Senior Riding Amtrak: My Ironic Article

[caption id="attachment_7248" align="alignright" width="480"] Amtrak traveling the countryside.[/caption] A handful of years ago, I wrote about my riding Amtrak from Charlottesville, Virginia to the 30th Street Station in Philadelphia, where I met a friend. It was actually a very pleasant experience, though a bit adventuresome for me. I could not anticipate the tragedy that would occur in 2015 in that very city of "brotherly love." I resubmit my original article, below... What would go through your mind if this had happened to you? ---------- Are you a "senior" in your 60s, 70s, 80s or even older? Ever wondered what riding Amtrak is like? Take a virtual ride with me now, from Charlottesville, VA, through Washington, DC, to Philadelphia, PA. A good friend had a happy and important occasion he desired…
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