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Sport Science , IEB biomechanics notes
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, Leverslevers 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
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