224 



If N signifies the number of points on the drum, T 

 the corresponding interval in seconds, we have 



T 



n = N-^ 

 lo 



Anemoraetei' I. 



a) The short arm l.si m. 



1 speed 



T 



59.7 5 



50.0 



58.7 5 

 58.7 5 

 59.25 



N 

 6 

 6 

 7 

 6 

 6 



2 speed 

 T 



29.2 5 



29.0 



30.6 



29.2 5 



29.7 5 



N 

 8 

 7 

 7 

 8 

 8 



3 speed 

 T N 



15.25 



15.00 

 15.00 

 15.00 

 15.00 



Average 114.40 13.o 58.6 5 15.2 30.20 16.4 

 Hence we deduce: 

 The short arm way in meter time speed 



a 1) 94.8 8 

 2) 

 3) 

 The long arm 



h) 1) 189.7 5 

 2) » 



3) 



Using the least square method we shall have: 

 a) a = 0.4 2 8 and h = 0.7 3 3 



h) «= 0.437 » 6=0.717 



And also if we take the average for both arms 

 y = 0.4 3 3 -i- 0.1 25 n 



n 



1.57 



3.8 7 

 7.97 



1.71 



3.8 9 

 8.15 



