3 ms·

Yeah, that seems dangerous. There is usually a hard 45mph minimum on the highways near me.

• saalweachter 7y ago
  I'm never going to to discourage people from driving slow, because our monkey brains have shit reaction times and perception, and KE increases with the square of velocity, but if you're traveling well below the normal speed of travel, put your flashers on. In many places this is mandated for a certain amount under the limit.
  • cardiffspaceman 7y ago
    In my view the wreck isn’t made worse so much by absolute magnitude of one momentum vector as by the magnitude of the difference in momentum vectors.
    • dahfizz 7y ago
      You have to consider that after a wreck, both cars have to come to a stop one way or the other. Imagine being rear ended while you are stopped at a stop sign. The difference in momentum is small and there is no significant damage. Now imagine going 80mph down the highway and someone going 81mph hits the back of your car. Still a very small difference in momentum, but your car is very likely to lose control and roll or hit other cars. It's not always the initial impact that does all the damage.
      • saalweachter 7y ago
        To put it another way, every collision you are in is also a collision with the Earth, which masses a lot more than you and wins every exchange of momentum. Conveniently, your delta-v with this massive body you don't want to run into is also the one conventionally reported for your speed.