EQUILIBRIUM OF NON-CONCURRENT FORCES

Other Chapters

• Q1: Define Concurrent Forces.
  Ans: Concurrent forces are forces whose lines of action meet at a single point.
• Q2: Define Non-Concurrent Forces.
  Ans: Non-concurrent forces are forces whose lines of action do not meet at a single common point.
• Q3: Define Couple.
  Ans: A couple is a pair of equal and opposite forces whose lines of action do not coincide and produce rotation only.
• Q4: Define Coplanar Non-concurrent Forces.
  Ans: Coplanar non-concurrent forces are forces acting in the same plane but not meeting at a single point.
• Q5: Define Non-Coplanar Non-concurrent Forces.
  Ans: Non-coplanar non-concurrent forces are forces that do not lie in the same plane and do not meet at a single point.
• Q6: Define Like Parallel Forces.
  Ans: Like parallel forces are forces that act in parallel directions in the same direction.
• Q7: Define Unlike Parallel Forces.
  Ans: Unlike parallel forces are forces that act in parallel directions but in opposite directions.
• Q8: Define Resultant Force.
  Ans: Resultant force is a single force that has the same effect as a system of forces acting together.
• Q9: State Varignon’s Theorem.
  Ans: Varignon’s theorem states that the moment of a resultant force about a point is equal to the sum of moments of individual forces about the same point.
• Q10: Define Equilibrium.
  Ans: Equilibrium is the state of a body when all forces acting on it are balanced and there is no motion.
• Q11: State the types of Equilibrium.
  Ans: The types of equilibrium are:

  • ➔ Stable equilibrium
  • ➔ Unstable equilibrium
  • ➔ Neutral equilibrium
• Q12: Define Static Equilibrium.
  Ans: Static equilibrium is the condition in which a body remains at rest under the action of balanced forces.
• Q13: Define Dynamic Equilibrium.
  Ans: Dynamic equilibrium is the condition in which a body moves with constant velocity under balanced forces.
• Q14: State the conditions of Equilibrium.
  Ans: The conditions of equilibrium are:

  • ➔ Sum of all forces in x-direction = 0
  • ➔ Sum of all forces in y-direction = 0
  • ➔ Sum of moments about any point = 0
• Q15: What is a Free Body Diagram?
  Ans: A free body diagram is a diagram showing all external forces acting on a body isolated from its surroundings.