Posted by **Laura** on Wednesday, October 3, 2012 at 10:57am.

A parachute on a dragster racing-car opens and changes the speed of a car from 85 meters/second to 45 meters/second. Of this car is decelerating (slowing down) at a rate of -8.9 meters/ second, how many seconds will this take?

- Intergated chemistry/physics -
**Steve**, Wednesday, October 3, 2012 at 11:33am
(45-85)/(-8.9) = 4.5

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