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Engineering Mechanics

Unit 1 & 2 two mark questions

1. Define Engineering Mechanics.

2. State Newtons laws of motion.3. Define unit vector

4. What are the direction cosines?

5. Distinguish the following types of forces coplanar and collinear.

6. A force has components Fx=150N, Fy=-420N, Fz=500N.Determine the magnitude of

the forces and x, y and z it forms with co ordinate axis.

7. Determine the resultant of the three forces F1=3i+2j-2k, F2=-i+5j+4k, F3=9i+3j-4k

8. State lames theorem

9. Write the conditions of equilibrium

10. What are the methods available to find the resultant of two forces?

11. State the principle of transmissibility.

12. How many reaction components in fixed support.13. What are the conditions of equilibrium of a rigid body in 2D system?

14. Define beam, what are the different types.

15. What is collinear force system?

16. State the varignon theorem

17. Find the moment of fcorce of 15N acting along the positive direction of X axis about

the point A(2,3)

18. Find the magnitude and direction cosines of the resultant of the resultant of two

concurrent forces: F1=4i+8j-8k & F2=5i-5j+4k

19. With neat sketches represent the reaction components of hinged, roller and fixed

supports.

20. State the triangular law of forces.21. What is the general condition of equilibrium of a rigid body?

22. What is the moment of s force about an axis?

23. A simply supported beam of 6m span carries a concentrated load P at 2m from the

left end. If the support reaction at the left end support is 8kN,find P

24. Differentiate between resolution and composition of forces.

25. What are the conditions of equilibrium of a rigid body subjected to coplanar forces?

26. To find z, the directions of angles of line are x=650, y=110 0

27. Define Resultant force and equilibrium

28. Define the term couple.

29. Draw the free body diagram of a ball (sphere of weight W, resting on a frictionless

plane surface shown below.(see fig 1)30. With help of a simple illustration define free body diagram.

31. Draw the reaction on free body diagram for the following supports.

a. simple support or knife edge support

b. roller support

c. hinged or pin joint support

d. fixed or built in support

32. Draw the reactions on the free body diagram for a body resting on

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