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by 05
3876 days ago
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Fixed 1 second of braking time won't save you if the front car hits an immobile object.
The correct formula would be (1 + .046 mph) seconds [0], where mph is speed in miles per hour. It evaluates to 3.76s at 60mph and at 4.9s 85.
Note that 1 second of reaction time is not exactly generous: http://www.webpages.uidaho.edu/niatt_labmanual/chapters/geom... - cites times 'less than 2.5 seconds' to actual brake application. [0] 1mph/(9.8m/s2) in seconds, according to Google, assuming friction coefficient of 1 |
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