Timeline for Why doesn't a braking car move backwards?
Current License: CC BY-SA 4.0
9 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Dec 10, 2018 at 11:01 | comment | added | JiK | @kiltek Yes, but my point is that "It's designed so that it's supposed to happen." is not a physics answer to a physics question "Why does this happen?". | |
| Dec 10, 2018 at 9:24 | comment | added | kiltek | @JIK The most primitive and simplified form of a brake does indeed work like it was described in this answer -think of a simple break on a bicycle- there is no need to put ABS into the equation, which is just something like a throttle for the friction imposed on the break disc. | |
| Dec 7, 2018 at 20:47 | comment | added | JiK | @Luciano The brakes in a car are not supposed to stop the wheel from spinning. That's why we have ABS, to prevent the brakes from stopping the wheels from spinning too early. The brakes in a car are supposed to slow down or stop the car. So would you say that the answer to OP's question is "The brakes in a car are supposed to stop the car"? No you wouldn't, you would explain how and why the brakes stops something. | |
| Dec 7, 2018 at 19:10 | comment | added | luci | @JiK Op didn't ask about that, he asked "where is the logic incorrect?" The logic is incorrect in knowing what brakes in a car are supposed to do: they stop the wheel from spinning. How they accomplish this task is a different question altogether, which you are right I might have included in the answer. I just assumed op knows about friction and that his question was due to a misunderstanding on how cars work rather than physics. | |
| Dec 7, 2018 at 18:55 | comment | added | JiK | @CramerTV Something like that is indeed what is missing from this answer. | |
| Dec 5, 2018 at 20:06 | comment | added | CramerTV | @luk32, There is no magic. Brakes are simply a way to turn kinetic energy into heat. Once the kinetic energy is gone there is nothing left for the brakes to do. | |
| Dec 5, 2018 at 14:05 | comment | added | luk32 | IMHO that doesn't answer the question at all, it just reiterates it. There must be some force working against current motion of wheels. The question is why it magically stops working when the wheel stops, and doesn't continue making it spin backwards. | |
| Dec 5, 2018 at 2:11 | comment | added | BruceWayne | Here's a gif of brake pads working. May help to visualize it. | |
| Dec 5, 2018 at 0:41 | history | answered | luci | CC BY-SA 4.0 |
