Calculating Variables for Bending a Beam

[EternityMech]

How many variables would i need?

I already know the

1.Length of beam
2.Weight of object on beam
3. Width
4.Thickness
5. Weight of beam
6. Young's module
7. Gravity? (not sure since the weight of object already has gravity and the same weight on the moon not mass would make it bend the same way am i right?)

What am i missing?

 

[Studiot]

Position of object on beam?

 

[Hootenanny]

You would also need to know the boundary conditions (how the beam is supported).