Posted by **Tracy** on Saturday, February 4, 2012 at 9:56pm.

Jamaican sprinter Usain Bolt holds the world record for the men's 100 meter dash with a time of 9.58 seconds. Another runner is training to break this record and finds that he can accelerate at a constant rate of 1.07 m/s^2. Assuming that the runner starts from rest, will he be able to break the world record?

a=v/t= the second runner dash with 9.76 seconds so no, he will not be able to break the record.

Is this right?

- Physics -
**drwls**, Saturday, February 4, 2012 at 10:01pm
If the second runner can continue to accelerate at 1.07 m/s^2 from a standing start, after 9.58 seconds he will travel

(1.07/2)*(9.58)^2 = 49.1 m, and he will be very far behind when Bolt completes the race.

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