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October 1, 2014

October 1, 2014

Posted by **megan** on Saturday, February 23, 2008 at 6:34pm.

d=0.0155s(squared)/f

f represents the coefficient of friction b/w the tires and the road

*it took a car 205 feet to stop. what speed was the car traveling? use f=0.3 and round your answer to the nearest mile per hour.

i did 205= 0.0155s(squared)/0.3...idk how to solve this

- algebraic reasoning -
**Damon**, Saturday, February 23, 2008 at 7:17pm205 = 0.0155 s^2 / 0.3

multiply both sides by 0.3

61.5 = 0.0155 s^2

divide both sides by 0.0155

3968 = s^2

take the square root of both sides

63 miles per hour

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