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Levers and Stability - Coggle Diagram
Levers and Stability
First class lever
fulcrum in
middle
ONLY at extension of elbow
effort goes
down
Mechanical Disadvantage
:gear::red_cross:
larger range of movement - force can be applied quicker - add speed to objects
not good at lifting heavy loads/overcoming resistance
Second class lever
effort goes
up
load in
middle
ONLY at ankle/foot
Mechanical advantage
:gear::check:
good for lifting heavy weights and overcoming resistance
limited and slower range of movement
Third class lever
effort goes
up
(any other joint)
effort in
middle
Mechanical Disadvantage
:gear::red_cross:
larger range of movement - force can be applied quicker - add speed
not good at lifting heavy loads/overcoming resistance
Stability
Centre of Mass
lowering CoM will increase stability
Line of gravity
more central over base = more stable
Area of support base
wider base of support provides more stable
Mass of Performer
greater mass = increased stability
Mechanical AD + disAD
advantage
= force arm is longer then resistance arm
disadvantage
= resistance arm is longer then force arm