BOWS LEVERS:
Lever ie « rigid Ser revolving about a fixed point.(axie or fulerun)

fe setion of bones es levers and the ection of muscles to nove
these levers fie funderentel te kinesiology, since all forma of ohysical
movement occur thra the uce of levers

There ere 3 types of levers:

Ae Lever of first eless bas axis between the other two pointeie
foree ari weight ect in eare directions, Ex. triceps muscle seting on
elbow Joint (axie) and weight ie bande

( Weaghr a _ Weis R —

“RQ4 £ Woxele.

Wagner
or

Wear ae ee

Be Lewor of second oclese bes the reistence on weight applied bee
tween the foree or muscle pull and axie; feree and resistance act in
opposite directions and the foree required ie lese than the weight or
resigterce. Very few ( some cay none ) levers of second clase in bodys

 

Coun
: Voll of “mosele
Ane is un - wins
Weve Loreen ; ewan
Werghr a

Keais' once.

Ce Levers of third clesseehave force applied between the resista nee
and the axis; force and resiste:ce work in opposite directions; force
alwaye greater than the resistances

Exe biceps as foree, eller as axis and weight the hands

Wosele Toll
5 “ o Yoece.