Why do I get the feeling the occupation media believes this guy sat around all day with apples hitting him in the head and nothing else?
We are devolving as a species.
Posted on 05/16/2015 3:52:39 PM PDT by Duke C.
Yup. KE=1/2M(Vsquared)
You better go relearn some basic physics. F does not equal MV-squared.
Train physics, Its all about the go-mentum.
“Why do you want to square v?”
kinetic energy
E = (mv**2)/2
70 mph is just over 102 ft/sec, not 88 ft/sec
bowling ball mass of 15 pounds equates to 0.466 slugs (pounds are a unit of force, not mass)
gives us about 2425 foot-pounds of energy. So the analogy of a BB hitting an auto is not too far off.
Much about a collision result depends on the materials of the colliding objects, their angle of impact, their shape, etc. Momentum is a factor: the scalar product of mass and velocity.
To carry on with the analogy, a human struck by that 15-pound bowling ball traveling 70 mph (102 ft/sec) will sustain injuries quite different from a human struck by - say - a 30 cal bullet traveling 2700 ft/sec (common impact velocity fired from many hunting rifles), though the kinetic energy of the projectiles are nearly identical.
>> going 106 MPH into a 50 MPH curve.
Then he slammed on the brakes.
There is no debate. 106 MPH says it all. A train runs on a track. It’s not like you have to keep in a lane like a car. He was distracted or dozed off and missed a warning.
The ball's kinetic energy would be
0.5*15*(70*5280/3600)**2 = 79,053.3 foot-pounds
or about 0.0298 kilowatt-hours.
We know from recent news that a train hitting an SUV can derail -- I was surprised to learn that. I have also arrived on a scene where a freight train passed through a semi trailer only minutes before - no derail; I suppose because it was a perfect broadside.
The smell of Kraft jelly and bar-b-cue sauce was heavy in the air, though -- that being the cargo in the trailer.
Thanks for your reply. The train was traveling at 70 MPH (88FPS) not the bowling ball. What would be the correct equation?
A car weighs a hell of a lot more than a bowling ball and would very rarely, if ever, derail a train. What derails trains is excessive speed in a turn for the bank angle, or problems with the rail. Loose rail, gap, foreign object attached to it, etc.
whaaa?
The expert is bogus. There is no way a surprised jerk movement could instantly take a train from 50 to 100 mph that quickly. Or reduce speed from100 to 50 that quickly either.
Shhh! I wasn't going to tell them about those!
F=MV\2 = republican’s fault
You're welcome!
Derailers look kinda heavy.
Steal frames would seem to be a ‘hood thang.
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