This document discusses friction and its types. It covers frictional force and different types of friction such as static and kinetic friction. It also discusses the friction that occurs between a screw and nut, including different types of threads used and terminology related to screws. Additionally, it mentions screw jack friction.

1. FRICTION
UNIT-5

2. FRICTIONAL FORCE

3. .

4. TYPES OF FRICTION

5. .
TYPES

6. .

7. .
TYPES

8. .

9. .

10. .

11. .

12. .

13. .

14. .

15. .
.

16. .

17. FRICTION OF SCREW AND NUT

18. .

19. TYPES OF THREADS

20. TERMINOLOGY USED IN SCREWS

21. SCREW JACK FRICTION
.