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- Subject
- Applied Mechanics and Graphic Staticscivil-engineering-mcqs › applied-mechanics-and-graphic-statics
- Published
- 18 Jan 2019
- Last updated
- 28 May 2026
Explanation
When the resultant of two forces has the same magnitude as one of the forces, the angle between them must be 120°. This is derived using the law of cosines applied to the vector addition of forces.
More Applied Mechanics and Graphic Statics MCQs
Practice related questions from the same subject.
- 1.Which of the following statements is accurate regarding centrodes?
- 2.Two forces, P and Q, act perpendicular to each other. Force P has a magnitude of 50 N, while force Q is unknown. They are counteracted by a single force of 130 N. What is the magnitude of force Q?
- 3.What are the angles between two forces that result in the minimum and maximum magnitude of their resultant force, respectively?
- 4.Two forces, P and Q, combine to produce a resultant force R. If the magnitude of Q is doubled and the new resultant becomes perpendicular to P, what can be concluded?
- 5.A disc with a mass of 4 kg, radius of 0.5 m, and a moment of inertia of 3 kg·m² rolls on a flat surface with its center moving at 5 m/s. What is the total kinetic energy of the disc?
- 6.Which of the following represents a state of unstable equilibrium?
- 7.A uniform pyramid and a uniform prism, both having the same height, are placed on a flat surface with their bases down. Which of the two is more stable?
- 8.A rigid body is considered to be in stable equilibrium if any applied force__________________?
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