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October 31, 2014

October 31, 2014

Posted by **Set8** on Friday, November 4, 2011 at 11:22pm.

If a sprinter reaches his top speed of 10.8 m/s in 2.54 s, what will be his total time?

- Physics -
**drwls**, Saturday, November 5, 2011 at 12:17amWhile accelerating, he runs 5.4*2.54 = 13.72 meters. (The average speed is half the maximum).

That leaves 86.28 m still to be run at 10.8 m/s. That will take 10.8/10.8 = 7.99 s.

The total time for the 100 meters is

7.99 + 2.54 = 10.53 s

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