With above-average human reflexes, the kid would have been hit at 14mph instead of 6mph.
About 5x more kinetic energy.
About 5x more kinetic energy.
So if we're going to have cars drive irresponsibly fast near schools, it's better that they be piloted by robots.
But there may be a better solution...
In my experience in California, always and yes.
But that depends on reliability, especially in unforseen (and untrained-upon) circumstances. We'll have to see how they do, but they have been doing better than expected
Jumping out of a plane wearing a parachute vs jumping off a building without one.
But acceleration is hard to calculate without knowing time or distance (assuming it's even linear) and you don't get that exponent over velocity yielding you a big number that's great for heartstring grabbing and appealing to emotion hence why nobody ever uses it.