Beam Moment Support: Debunking the Need for End Moments

[chandran]

i have a beam with no constraints. Now i apply a moment at some point in the beam. Now am i correct to say that i need not fix the end of the beam(like a beam inserted into a wall). instead i could support the end of the beam like a simply supported beam.

because a moment tries to rotate the object with the axis as the point of application of moment. I can always prevent rotation by applying force at some other point(simulating like a simply supported beam).


This disproves the theory that the moment applied at some point of the beam should be supported by a moment at the end of the beam. Instead the beam can be supported by a force at the end of the beam

 

[Pyrrhus]

This disproves the theory that the moment applied at some point of the beam should be supported by a moment at the end of the beam. Instead the beam can be supported by a force at the end of the beam

What theory is this?

If you only support the beam by one end, and the support is not embedded (inserted in a wall), then your system is not stable. More equations than unknowns.