[Daily Question] Theoretical Basis 2020.01.13

2020-01-13View Original

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Multiple choice questions: The structure shown in the figure is composed of three rods AC, BD, and CE. A, B, D, and C are hinged, and E is in smooth contact. known: Fp=2kN, θ=45°, rod and wheel weights are not included. Then the angle between the direction of the restraining force at E and the positive direction of the x-axis is ( ). A. 0° B. 45° C. 90° D. 225° Answer: BE is a smooth surface constraint. The binding force must be a pressure, and the direction is perpendicular to the contact surface and pointed towards the object. Therefore, the angle between the direction of the restraining force at E and the positive direction of the x-axis is 45°. Tip: Those who can explain the problem-solving process will be given extra rewards, and the answers will be visible in the replies!

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[Daily Question] Theoretical Basis 2020.01.13

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