Introduction of lever and its types

1. Presentation on
Lever and its types
BY
RONIT KUMAR
Dpt Student of Cop, JPMC

2. ▪ When person is moving his legs
-arms-any part of his body.
▪ He depend on his skeleton
system ( muscle forces ) by
contraction or extension
muscles.
▪ Infact the bone in moving work
as a lever.
➢ INTRODUCTION OF LEVER

3. ▪ A rigid bar that turns about an axis of
rotation or a fulcrum
➢LEVER
❑PARTS OF LEVER
▪ FULCRUM OR PIVOT
▪ EFFORT OR FORCE
▪ LOAD OR RESISTANCE

5. > Types of lever
• 1st order lever
• 2nd order lever
• 3rd order lever

6. 1st order lever
01
▪ The fulcrum is between the effort and the
resistance .
▪ Examples; scissors, pilers, crow bal
▪ Examples in human body; Atlanto-
occipital joint, The joint b/w the
hummers radius-ulna.

9. > The resistance lies blw the Fulcrum and the Effort..
2nd order lever
.
Examples
> Also called The lever of power..
Wheel barrow, Nut cracker,
.

10. Example
in human body

11. Key words
> Third order lever the mechanical advantage is normally
less than one.
> LEVER OF VELOCITY
D
3rd order lever
> The Effort lies b/w the Fulcrum and resistance.

12. .
Examples; Fishing rods, Cricket bats, Hockey

13. Example in human body;
> Flexion of elbow