this post was submitted on 16 Feb 2026
374 points (98.7% liked)

Crazy Fucking Videos

8469 readers
111 users here now

Dive into the World of Insane Videos!

Rules

  1. No hate speech of any kind.
  2. Content warnings are required in post titles where applicable. Example: [CW: Injury]
  3. Use your best judgement and mark NSFW posts as such.

founded 2 years ago
MODERATORS
 

This experiment spectacularly showed how relative speed works.

you are viewing a single comment's thread
view the rest of the comments
[–] ReluctantMuskrat@lemmy.world 1 points 1 day ago (1 children)

He's actually rapidly decelerating. It's like slamming on the brakes and coming to a stop, but backwards.

[–] Evil_Shrubbery@thelemmy.club 2 points 1 day ago (1 children)

He is facing backwards so if you are differentiating between acceleration & deceleration then he was accelerated bcs he was facing the same way we the vector.

[–] ReluctantMuskrat@lemmy.world 1 points 1 day ago* (last edited 1 day ago) (2 children)

Which way he's facing makes no difference. Relative to the ground, by which we are measuring his speed and on which he comes to rest, he is decelerating. Just as a seat belt presses against your waste and chest to decelerate you when braking hard, the chair he's sitting in is doing the same, but against his entire back.

I will however agree relative to the moving vehicle he is accelerating in the opposite direction of motion, but that not the frame of reference by which we've documented his moving velocity.

[–] Evil_Shrubbery@thelemmy.club 2 points 22 hours ago

Acceleration is a vector with magnitude and direction.

[–] BanMe@lemmy.world 1 points 1 day ago

The question is what it would FEEL like, not the technical physics.