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//
// A hollow right circular cylinder of radius 800 mm is open at both ends and rests on a smooth horizontal plane. Inside the cylinder there are two spheres having weights 1 kN and 3 kN and radii 400 mm and 600 mm, respectively. The lower sphere also rests on the horizontal plane.
// Join the centres of spheres, O1 and O2 and drop O1D perpendicular to horizontal through O2.
//variable declaration
R=800.0
W1=1.0
r1=400.0
W2=3.0
r2=600.0
O1O2=1000 //mm
O2D=600 //mm
//If alpha is the inclination of O2O1 to horizontal
alpha=acos(O2D/O1O2)
//Free body diagrams of cylinder and spheres are shown. Considering the equilibrium of the spheres.
//Sum of Moment at O2
R1=W1*O2D/(O1O2*sin(alpha))
//sum of vertical Fy & sum of horizontal forces Fx is zero
//Assume direction of Fx is right
//Assume direction of Fy is up
R2=R1
R3=W1+W2
//Sum of Moment at A
W=R1*O1O2*sin(alpha)/R
printf("\n W= %0.2f KN",W)
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