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Usain and Mo race one another over 100m. When Usain crosses the finish line, Mo is only at the 90m mark. They agree to have a second race, but to make it fairer, Usain will begin 10m behind the starting line. All things being equal, who would you expect to win the race?

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Common Wrong Answers

Mo will win

Mo is slower than Usain, so even with a head start, he won't be able to maintain the same speed as Usain over the last 10m.

They will tie

Given that Usain is faster overall, he will finish the last 10m quicker than Mo can cover the remaining 10m, resulting in a win for Usain.

Usain will lose

Usain's superior speed means that despite starting 10m back, he will still be able to overtake Mo and finish the race first.

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