SPRING 2005

 

HOMOKINETICS II

ASSIGNMENT # 3

 

 

  1. A swimmer covers the first 50 m length of a 100 m backstroke in a 50 m pool, at an average speed of 1.5 m/s and the second length at an average speed of 1.2 m/s.  (a) What were the times for the first and second lengths, respectively?  (b) What was the speed for the whole race?  (c) What was the velocity for the whole race?

 

 

 

 

 

 

 

 

 

  1. In July 1985, Steve Cram (Great Britain) became the first man to run 1500 m in under 3 min 30 s, when he set a world record of 3 min 29.67 s in Nice, France.  Cram’s time for each of the fifteen, consecutive 100 m parts of the race were as follows:

1. 13.5 s                                   6. 14.1 s                                               11. 14.6 s

2. 14.0 s                       7. 14.5 s                             12. 13.3 s

3. 13.7 s                       8. 15.0 s                             13. 14.0 s

4. 14.3 s                       9. 14.5 s                             14. 13.7 s

5. 14.6 s                       10. 13.7 s                                 15. 12.2 s

 

Using these times, compute Cram’s average speed (a) over the full distance (b) over the first 800 m and the final 700 m (c) over each of the first three 400 m and the final 300 m.