weight=m*g(newton),bodyloading=weight/wetted area(body)

intrgrl(a,b)d pressure/d height body=1/2mdeltav+lift/weight

v:glide(body)=sqrt:2*delkta pressure(x)dy/weight

cd body=1/2*mdelta v/bodyloading,

1/2 *rho *v^2*cd(dody)*wetted area=drag,

v (sink)=lift(alpha)/weight*sin gamjma



re (flying bottle)=(lift(velocity)/weight*v(climb)*length/diameter this is only true if q=1/2*rho*v^2

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