Wednesday

October 1, 2014

October 1, 2014

Posted by **Liz** on Tuesday, January 17, 2012 at 10:27pm.

- physics -
**Steve**, Wednesday, January 18, 2012 at 4:46amThe first runner accelerated for 2 seconds, achieving a velocity of v = at = 2a, which he used for the remainder of the race:

100 = 1/2 a(2^2) + a(2)(8.2)

100 = 2a + 16.4a = 18.4a

a = 5.43m/s^2

similarly for the 2nd runner:

100 = 1/2 a(3^2) + a(3)(7.2)

100 = 4.5 a + 21.6a = 26.1a

a = 3.83m/s^2

**Answer this Question**

**Related Questions**

Physics - A sprinter accelerates at 4 m/s2 for 3 seconds, and then runs the rest...

science - A simple model for a person running a 100m race is to assume the ...

Acceleration physics - 1. A sprinter finishes the race with a velocity of 8.9 m/...

Physics - A sprinter starts from rest in a 100-meter race, accelerates to his ...

college physics - A sprinter can reach a speed of 9.0 m/s in 1.0 s. If the ...

physics - A sprinter can reach a speed of 12 m/s in 0.96 s. If the sprinter’s ...

Physics (College) - One simple model for a person running the 100 m dash is to ...

Physics - An olympic sprinter can run 100yd in 9.0s. At the same rate, how long ...

Physics - In a 100 m race, Maggie and Judy cross the finish line in a dead heat...

Physical Science - An Olympic sprinter can go from a state of rest to 11 meters...