In order to start the column of "Railroad Accident - Physics", I am researching various things in Internet image search.

I felt it is painful to research for preliminary survey for the first time.

While putting up with the vomiting feeling, I am collecting data.

If someone watch the research file, I'm sure that they can make a mistake about me.

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However, while I was watching the images all day,

"No way. Is there a pictures of the meat pieces scattered on railroad tracks ?"

I came to complain about the photos.

Because I cannot calculate the dynamic friction coefficient, the rolling resistance coefficient, and the restitution coefficient, in order to specify the correct position where scattered meat pieces are distributed.