Homework Help: Physics

Posted by Stacy on Thursday, February 2, 2012 at 4:21pm.

In a 100 m race, Maggie and Judy cross the finish line in a dead heat, both taking 10.6 s. Accelerating uniformly, Maggie took 2.20 s and Judy 2.90 s to attain maximum speed, which they maintained for the rest of the race. What was Maggie's acceleration?

Physics - Steve, Thursday, February 2, 2012 at 4:32pm
Maggie:

1/2 a*2.2^2 + 2.2a*8.4 = 100
a = 4.78

Judy:

1/2 a*2.9^2 + 2.9a*7.7 = 100
a = 3.77
Physics - Stacy, Thursday, February 2, 2012 at 4:35pm
Thanks so much!!! If you have time can you help me figure out their max speeds?
Physics - drwls, Thursday, February 2, 2012 at 8:13pm
Fot max speed, multiply the acceleration rate by the length of time that person accelerated

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