Sport Science , IEB biomechanics notes

, Levers
levers are classified according to where fulcrum , load / resistance , effort are .




↳
pivot point

1. Class I

-



fulcrum in middle & ,



-



effort is applied on one side of fulcrum
-

resistance on other side


fulcrum
¥
be




1. Class I &
,


-



resistance / load in middle
-



effort applied on one side of resistance
-




fulcrum on other side §
fulcrum
&




3. Class 3
-



effort in middle ¥
-




resistance on one side

-

fulcrum on the other side

¥
fulcrum
te




°
lever =
a rigid rod that turns about a fixed point / Pivot ljoint ) and serves as a fulcrum .




it / Used to apply force / effort ) against resistance ( load )
0
Mechanical advantage =
levers are used so small force moves a bigger load




Bones levers
-



=




-


joints =
pivot / fulcrum

-



muscles = effort / force

-



weights =
load / resistance

o
lever provides strength , amount of strength of a muscle depends on position of where effort is applied relative to joint
o
greater distance between joint + effort =

more strength generated

advantage of long arm span



levers -1
forearms

-


bicep curls 1 Bending elbow → arm =
lever

↳
longer lever ,
bigger force exerted w/ same amount of effort




reach

-



longer arms =

more reach