1.Determine the reactions at A and B when (a) α = 0, (b) α = 90°,
(c) α = 30°.
Consider a simple problem:
The force F is applied at the center of the rod. Hence, the reactions 1 and 2 at A and B will be equal.
(a) α = 0:
Reactions point to the right (opposite to the force)
(b) α = 90°,
Reactions point opposite to F downward.
(c) α = 30°
Reactions point to the left bottom corner at the same angle below the horizontal.