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August 30, 2014

August 30, 2014

Posted by **Anonymous** on Thursday, September 6, 2007 at 10:50pm.

Work (so far):

100 m x 1 km/1000 m x .621 mi/km =0.0621 mi

Answer (back of the book): -3.60 m/s^2

- physics -
**drwls**, Friday, September 7, 2007 at 1:25am60 mph = 88 ft/s = 26.82 m/s

To decelerate from 26.82 m/s to 0 in 100 m, the time of travel will be

(100 m)/(average speed) = 100/13.41= 7.46 s. The deceleration rate is 26.82 m/s/7.46 s = -3.59 m/s^2

Since there are only two significand figures ikn this problem, it should be rounded to -3.60 m/s^2.

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