In addition to the mass of the plow, a mass of water, the added 

 mass, will also be accelerated and will add to the power requirement. 

 Approximating the triangular plowshare cross section with a rectangular 

 cross section, the added mass is given by (Reference 46): 



P = m X X 



2 2 3 



K p IT a £ A (jo sin to t cos u t 

 1 w 



2 2 3 



K. p TT a I A 0) sin 2 03 t 

 1 w 



where x = A sin o) t 



X = A oj cos CO t 



2 

 X = - A 0) sm to t 



The power which must be supplied is the rms power 



1/2 



, (^ // -) 



where the period T = 1 /f = 2 ir/o 



2-n/ui /„ 2 „ .2 3\ 



/.' /Kp TTa £Aa)\ „ 



1 sm 2 03 t dt 



,/ P 



/ 2 2 3 



'K. p ir a Jl A 03 

 1 w 



K^ p IT a I A 03 

 1 w 



Zy/Y 



1/2 



2tt/o3 



1/2 



60 



