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## Homework Statement

let there be a beam connected to a wall at one end (left).

in the other end there is a cylinder attached to the beam with an inertia moment of I0

the cylinder is then connected to a torsion spring which is connected to a right wall

the beam (cantilever) has a inertia moment - I ,young modulus - E and the length is L.

## Homework Equations

what are the exact boundary conditions of the problem? (I believe there are 4

2 of the left ones are trivial)

## The Attempt at a Solution

I thought of simply saying the torsion moment in one end has to be: tau=k*theta

where tau is the torque and theta the angle of torsion (k is the spring constant), then i can find a connection between the height of the beam and angle of torsion

(although not a linear one)

but there must be another boundary condition...