# Forces that determine velocity in running

1. Feb 2, 2012

### georg gill

1. The problem statement, all variables and given/known data

it is oblig 2:

http://www.viewdocsonline.com/document/0nf7ag¨ [Broken]

i wonder about assignment (i) in oblig 2

2. Relevant equations

3. The attempt at a solution

here is what i wrote

http://www.viewdocsonline.com/document/wi914l

i tried to use euler method on it in matlab but i got that he ran 100 m in 1.8 seconds so something has to be wrong. I am sure not many people are familiar with matlab here so I wont write that I just wonder if my way of writng $$a_3$$ in the second link here is correct

Last edited by a moderator: May 5, 2017