# Car decelerates at 1000 G:

sonhouse
Posers and Puzzles 21 Nov '14 15:18
1. sonhouse
Fast and Curious
21 Nov '14 15:18
So this car has a new field accelerator where every atom gets accelerated or decel at the same time so people inside feel nothing. The car can acel or decel at 1000G.

So this car is driving at 25 meters per second and the driver sees a kid on a bicycle about to be run down. After the driver activates the decel mode, how many meters does it take for the car to go from 25 m/s to zero?
2. forkedknight
Defend the Universe
21 Nov '14 16:28
So time is easy to figure out

V = V0 + at
a = -9800m/s^s
V = 0
V0 = 25m/s

t = 25/9800 = 2.55ms

For finding distance, you can find average velocity multiply by time
d = (Vi - Vf)/2 * t

d = 25/2 m/s * 2.55 ms
d = 31.9 mm
3. sonhouse
Fast and Curious
21 Nov '14 19:26
Originally posted by forkedknight
So time is easy to figure out

V = V0 + at
a = -9800m/s^s
V = 0
V0 = 25m/s

t = 25/9800 = 2.55ms

For finding distance, you can find average velocity multiply by time
d = (Vi - Vf)/2 * t

d = 25/2 m/s * 2.55 ms
d = 31.9 mm
Yep, pretty fast stop, eh! I used the old formulae S=(AT^2)/2 for distance and T= (2S/A)^0.5 and got the same answers.
4. 22 Nov '14 00:05
If it can accelerate for 8.5 hours it will be going at the speed of light.
5. wolfgang59