EN09 105 ENG.MECHANICS_STATICS_SHORTQUESTIONS

Short Questions [Statics]

1. State: law of transmissibility of force.
2. State: Lami’s theorem.
3. State: Parallelogram law of forces.
4. What are the characteristics of a force.
5. Explain the different types of forces system with neat sketch.
6. Distinguish between ‘Composition’ and ‘Resolution’ of forces
7. What is couple and moment of couple.
8. Define coplanar concurrent force system.
9. List the procedure for drawing a Free Body Diagram.
10. State the conditions for the equilibrium of rigid bodies.
11. State and prove Varignon’s theorem.
12. Derive the equations of equilibrium for a system of non-concurrent forces in a plane.
13. Explain how a force can be translated to a given point without affect`g its action on the body.
14. Three forces F1,F2 and F3 are proportional to and act along the three sides AC,CB and BA of a triangle ABC.Prove that they reduce to a couple whose moment is proportional to the area of the triangle ABC.
15. What is meant by “Static indeterminancy” ? Explain how it is determined for a structure.
16. Enumerate the condition of the line of action of three forces in equilibrium.
17. What is plane truss? What are the assumptions made in the analysis of plane trusses.?
18. Write briefly about’method of joints’ and ‘method of sections’.
19. When do you prefer method of section of method joints?
20. Explain the method of constructing Maxwell’s diagram.
21. Explain the difference between uniformly distributed load and uniformly varying load.
22. State the parallel axis theorem.
23. State and derive the relation for theorem of Pappus & Guldinus.
24. Define centroid of a section.
25. Derive an expression for the principal moments of Inertia.
26. What are polar moment of inertia and product of inertia.
27. State any four geometrical properties of sections.
28. State the perpendicular axis theorem.
29. Calculate the moment of inertia Ix of a homogeneous right circular cone with respect to an axis ‘X’ through the vertex and perpendicular to the plane of the base.
30. Find the first moment area of a semicircle of radius R about its base.
31. Distinguish between Static friction and Dynamic Friction.
32. State the laws of friction.
33. Define angle of repose.
34. Write short notes on angle of friction.
35. What are the advantages and disadvantages of frictional force..
36. State Coulomb’s laws of static friction.
37. Define rolling resistance.
38. What are the principal axes and principle moments of inertia?
39. State the direction of support reactions in the case of (a)simply supported and (b) hinged end and (c)Roller supported end.
40. What is meant by efficiency of screw jack? Derive expression for maximum efficiency.