In the 2008 Olympics, Jamaican sprinter Usain Bolt shocked the world as he ran the 100-meter dash in 9.69 seconds. Determine Usain's average speed for the race.

Question

anonymous · Answer

I think that this problem is very simple. You just have to know the equation of average speed.
$$V=100m \div 9.69s \approx10,31m/s$$

mathslover · Answer

oh sorry u r right .. i was applying (v-u)/t sorry ..

mathslover · Answer

and thanks a lot

anonymous · Answer

Excuse my English, I'm Brazilian and not speak English very well.

mathslover · Answer

no problem @PedroBarbosa