Charlesinrichmond t1_j9czaez wrote on February 21, 2023 at 12:37 AM

Reply to comment by rvapedant in Dear Cyclists (Especially you, orange jacket at Belvedere and Franklin) by [deleted]

it really doesn't matter if it's 2k, 4k, or 6k. All are more than enough to squish.

chihuahua001 t1_j9d7l73 wrote on February 21, 2023 at 1:40 AM

F=ma

Charlesinrichmond t1_j9fq76m wrote on February 21, 2023 at 4:27 PM

so if there is no acceleration, at steady speed, then a car exerts no force (true) and no damage (False) on what it hits?

I think F=mv^2/2 is rather more relevant here, with the exponent being exponentially more important.

And it still doesn't matter. 2k squishes just fine. You can't get more dead than dead

TheLombardyKroger t1_j9th5qk wrote on February 24, 2023 at 1:16 PM

An object travelling at a constant speed and direction may have no acceleration in its own reference frame, true. But it can absolutely accelerate another object in another reference frame.

I don’t know what “F=mv2/2” is but maybe you mean the equation for kinetic energy? KE = 1/2 mv^2

At any rate (ba-dum-tss), getting hit by cars sucks no matter how accurate the mass measurement is. The slower the better.

Charlesinrichmond t1_j9ugl9k wrote on February 24, 2023 at 5:20 PM

yes. Kinetic energy. And the speed matters is what I was saying. I know of people killed by bicycles