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by kssawyer on 02/28/05 at 19:25:49

If I am traveling at 45 mph and am covering 66 ft/sec, how long (in seconds) will it take me to come to a complete stop at a red light?

If anyone can help, Thanks! :)

Re: Deceleration
by Robert Fogt on 03/01/05 at 03:45:51

That would be different for every type of vehicle, and also depend on how well your brakes are working. There is no real way to calculate that.

If its for a specific type of vehicle, you could check the stats on the manufacture's website. I believe they list braking distances.

Re: Deceleration
by Kathy Sawyer on 03/01/05 at 12:20:00

Am I correct that traveling 45 mph without accelerating or braking I would be able to pass thru a 30 foot intersection in .45 seconds?  

Using the same calulcations as above, and there were a yellow light that lasted 4 seconds would 4 vehicles be able pass safely thru the intersection?

Thank you so much for your help!

Re: Deceleration
by Robert Fogt on 03/02/05 at 00:46:57

Thats correct.

45 miles/hour = 66 feet/second
30 feet / 66 feet/second = 0.45454545 seconds

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