Question

The diameter of cylinder A in figure 3 is double that of cylinder B

Determine the force F necessary to keep the system in equilibrium when a force F is applied as shown 

Answer 1

F1 = F2   or F1A2 =F2A1
A1    A2
F1 × π (^d/₂)2 =10 × π × (^2d/₂)2
F1 × d² =10d²
        4
F1 =40N