[Daily Question] Theoretical Basis 2020.01.11

2020-01-12 View Original

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Multiple choice questions: The structure is composed of straight rods AC and DE and right-angled bent rods BCD. Regardless of its own weight, it is acted upon by loads F and M = F · a. Then the angle between the line of action of the restraining force at A and the positive direction of the x-axis is ( ). A. 135 ° B. 90 ° C. 0 ° D. 45 ° Answer: Rod A AC is a two-force rod, so the direction of the constraint reaction force at hinge A must be along the direction of the two-force rod AC, and is opposite to the movement trend of the main dynamic couple M. The angle between the line of action and the positive direction of the x-axis is 135°. Tips: Those who can explain the problem-solving process will be given extra rewards, and the answers will be visible in the reply!

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[Daily Question] Theoretical Basis 2020.01.11

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