Direction 

 of Gravity 



Direction of Motion 



-J. 



Figure 1 - Coordinate System 



sin (j) 

 sin |sin cfi\ + w cos cf} 



[Id] 



where f = F/R and w = W/R. 



VALUES OF WEIGHT AND FRICTIONAL RESISTANCE PARAMETERS COVERED 



The critical angle <fi is related to the weight parameter, w = W/R, by the equation 



where the positive sign of the radical is taken for all values of w > The values of w for 

 the critical angles covered in the present tables are as follows: 



^c 



w 



^c 



w 



degrees 





degrees 













6 



0.0109864 



1 



0.0003046 



7 



0.0149637 



2 



0.0012187 



8 



0.0195595 



3 



0.0027428 



9 



0.0247768 



4 



0.0048778 



10 



0.0306189 



5 



0.0076251 







