Member $$'AB'$$ of the truss shown below has a lack of fit of $$1$$ $$mm.$$ $$B$$ if $$E = 2 \times {10^5}\,\,MPa,$$ area of $$c/s$$ $$ = 20\,\,m{m^2}.$$ The force in $$'AB'$$ is __________

The number of independent mechanisms the gable frame will have when loaded as shown is

A Propped cantilever beam is shown below. The plastic moment capacity of the beam is $${M_P}.$$ The collapse load is

The force in the number $$'CD'$$ of the truss in fig is