Question

a massless beam of length 5 m is placed on two wedges Aand B if three forces 3kN 4kM and 5kN are applied on the beam find normal reaction at A and B

Answer 1

If the beam is supported and there is no movement then the moment of forces about any support should be equal to 0. Let us take for B

i.e ∑MB=0

Or, anticlockwise moment = clockwise moment

So from figure