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January 27, 2015

January 27, 2015

Posted by **Emily** on Thursday, September 30, 2010 at 6:39pm.

I found the distance, which is 17 m, and the distance they still have to run to complete the race, which is 83m. I also calculated their second velocity, which is 9.8 m/s. But when I divide 83m by 9.8 m/s,(since that's the velocity for the rest of the race) I don't get the correct answer, which is 12 s.

- Physics -
**Henry**, Thursday, September 30, 2010 at 10:20pmV = at = 2.8 m/s^2 * 3.5 s = 9.8 m/s,

d1 = 0.5 * 2.8 m/s^2 * (3.5 s)^2 = 17.15 m,

t(total) = 3.5 s + 82.85 m / 9.8 m/s =

3.5 + 8.5 = 12 s.

- Physics -
**Emily**, Thursday, September 30, 2010 at 11:00pmThanks!

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