GIVEN

b$)$

d$)$

A $9$@$0$

f$)$

FIND

For statically determinate or indeterminate structures, show the numbers of equations and unknowns as well as "Determinate" or "Indeterminate" and the degree of indeterminacy if the structure is stable. When unstable, just state "Unstable" and draw the mechanism $($unrestrained motion for the structure$).$

SOLUTION

Write the answers and show work directly on the figures.

A structure cannot be both unstable and determinate or indeterminate. If it's unstable, it can't be analyzed. If it's determinate, it can be analyzed with just equilibrium. If statically indeterminate, the principles of equilibrium, compatibility and the constitutive law are all needed.