Three masses connected by pulleys

[haruspex]

the system is in static equilibrium .Use he principle of virtual work to find the weight A and B.Neglect the weight of the strings and the friction in the pulley

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Ok, so if A moves down one unit what does each of the other two masses do? What is the total work done on the system?
As I mentioned, you also need to consider another direction. Maybe think about A moving sideways. What is the work done now?

(For this problem, seems to me that writing the force balance equations is simpler than using virtual work.)

And this time, please show all your steps as equations, not as vague descriptions.

 

[new90]

i give up i will try this problem at some oint in the future

 

[etotheipi]

i give up i will try this problem at some oint in the future

If the virtual work approach is tripping you up, see if you can solve it using the good old static equilibrium approach. $\sum F_x = 0$, etc.

 

[new90]

thanks but I am tired of this problem

 

[archaic]

Can I have the complete problem statement please?

 

[haruspex]

Can I have the complete problem statement please?

Post #35.