Timeline for If $F=ma$, why do we need speed limits?
Current License: CC BY-SA 4.0
7 events
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| Jun 4, 2020 at 16:03 | history | edited | CommunityBot |
Commonmark migration
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| Jan 7, 2020 at 12:16 | history | edited | Kyle Kanos | CC BY-SA 4.0 |
miles per hour, not miles hour per ;)
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| Jan 7, 2020 at 11:05 | comment | added | The_Sympathizer | @TimWescott : And moreover, the occupants' bodies also behave in an analogous way when they contact the front of the crew cabin, and this is what causes the injury. If every part of their body came to rest simultaneously, there would be no injury. That's why a gravitational field - alone, without hitting anything, and suitably uniform - will not kill you no matter how strong. But because the front of both the moving car and moving bodies stops before the back, it creates deformation and thus damage. | |
| Jan 7, 2020 at 8:42 | history | edited | Steeven | CC BY-SA 4.0 |
deleted 6 characters in body; added 17 characters in body
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| Jan 7, 2020 at 8:37 | history | edited | Steeven | CC BY-SA 4.0 |
added 278 characters in body; added 5 characters in body; added 12 characters in body; added 16 characters in body; added 45 characters in body
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| Jan 7, 2020 at 0:15 | comment | added | TimWescott | Now that we have that out of the way: it's more complicated when a car is involved, first because there's not just one collision (the first is car vs. object, the second is occupants vs. car), and second because part of the first collision (car vs. object) involves the car deforming. The car isn't a perfectly rigid body, and various phases of the collision may tend to have the same deceleration from different starting speeds, just for different durations. | |
| Jan 6, 2020 at 22:47 | history | answered | Steeven | CC BY-SA 4.0 |