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Hey vsauce, Micheal here
assuming you're stationary and a rose is moving directly towards you, how fast would it have to be going to blueshift into looking blue?
what would happen on impact?
It would have to be moving at relativistic speeds, and given that F = mv² the velocity is the dominant factor when it comes to force. So, you'd probably get vaporized.
That is definitely not a correct expression for force. It doesn’t even have unit of force. Do better. smh
See https://mander.xyz/post/17123445 and in particular https://lemmy.blahaj.zone/comment/10334166.