Engineering Mechanics Lecture 7

1. DEVAPRAKASAM DEIVASAGAYAM
Professor of Mechanical Engineering
Room:11, LW, 2nd Floor
School of Mechanical and Building Sciences
Email: devaprakasam.d@vit.ac.in, dr.devaprakasam@gmail.com
ME202: Engineering Mechanics (3:1:0:4)
Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933

2. Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933
Moment of A Couple

3. Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933
Moment of a Couple
Two couples , one consisting of the forces F1 and
–F1, the other of F2 and –F2, will have equal
moment if F1d1= F2d21

4. Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933
Equivalent Couples of Moment

5. Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933
Addition of Couples

6. Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933
Reduction of System of Force

7. Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933
Reduction of System of Force
Any force ‘F’ acting on a rigid body can be moved to an arbitrary point ‘O’
provided that a couple is added whose moment is equal to the moment of F
about ‘O’

8. Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933
Resolution of Force into Force at ‘O’ and a Couple
Any force ‘F’ acting on a rigid body can be moved to an arbitrary point ‘O’
provided that a couple is added whose moment is equal to the moment of F
about ‘O’

9. Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933
Rigid Body Equilibrium

10. Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933
Example Problems

11. Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933
Example Problems

12. Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933
Example Problems

13. Devaprakasam D, Email: devaprakasam.d@vit.ac.in, Ph: +91 9786553933
Example Problems