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January 31, 2015

January 31, 2015

Posted by **Kristen** on Sunday, September 9, 2007 at 2:40pm.

- AP Physics -
**bobpursley**, Sunday, September 9, 2007 at 5:42pmLet tr be reaction time.

The distance traveled during the reaction time is vi*tr, so the distance traveled during stopping is (distancetotal-vi*tr). Now you have an equation...

Vf^2=Vi^2 + 2ad Use that. I will set up one equation for you, you do the second, and solve for tr, and a.

1) 0=24.4^2 + 2a (56.7-24.4tr)

2) ....

- AP Physics -
**Kristen**, Sunday, September 9, 2007 at 8:03pmI still dont get how to get the time it takes to decelerate from 82.5 to 50.3 km/h, i know its a constant deceleration, but i know how to find either the deceleration or the time

- AP Physics -
- AP Physics -
**Kristen**, Sunday, September 9, 2007 at 7:31pmI still dont get how to get the time it takes to get from 82.5 to 50.3 km/h, i know its a constant deceleration, but i dont know how to get the time

- AP Physics -
**Kristen**, Sunday, September 9, 2007 at 7:59pmI still dont get how to get the time it takes to get from 82.5 to 50.3 km/h, i know its a constant deceleration, but i dont know how to get the time it takes to decelerate

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