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For the determination of the forces at the supports which part is to be considered in the calculations?

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For the determination of the forces at the supports which part is to be considered in the calculations?

(a) The one having one unknown and two known forces

(b) The one having two unknown and two known forces

(c) The one having three unknown and two known forces

(d) The one having two unknown and one known forces

The question was asked in semester exam.

I'm obligated to ask this question of Internal Forces Developed in Structural Members topic in division Internal Forces of Engineering Mechanics

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Right choice is (a) The one having one unknown and two known forces

To elaborate: The determination is usually done in this manner only. The selection is done as by selecting the one having one unknown and two known forces. This will ensure that the unknown value will be found. And also we have less number of unknowns which are needed to be found.

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