(-* 



< 

 (/) 



O 



o 



o 



h- 

 o 



LJ 

 Q. 

 O 



_l 



4.5 



4.0 



3.5 



3.0 



2.5 



2.0 



I .0 



0.5 



0' ^ 1 1 1 i 1 \ I I I I I I I I I 



OO 0.1 0,2 0.3 04 0.5 0.6 0.7 08 



Figure 17. Slope friction constant, F , in equation (109) as a functic 

 of <J) and £ /L. ^ . 



58 



