examples:
Levers
F1 → 1st class = Δ • heading ball in football
L2 → 2nd class =
n
• jumping, netball shot in legs
E 3 → 3rd class = • bicep curl, quadriceps machine
1st + 2nd class levers:
mechanical advantage -
can lift more resistance with less effort
the effort arm is longer than the load arm
mechanical disadvantage -
little range of movement
speed of movement is less due to heavy load
3rd class lever
mechanical advantage-
• speed of movement is quicker
• better range of movement at joint
• the effort arm is closer to fulcrum than load.
◦ the joint is closer to the muscle so movement
is faster
mechanical disadvantage
• requires a lot of force to move heavier loads
• struggles to lift heavy loads
Levers
F1 → 1st class = Δ • heading ball in football
L2 → 2nd class =
n
• jumping, netball shot in legs
E 3 → 3rd class = • bicep curl, quadriceps machine
1st + 2nd class levers:
mechanical advantage -
can lift more resistance with less effort
the effort arm is longer than the load arm
mechanical disadvantage -
little range of movement
speed of movement is less due to heavy load
3rd class lever
mechanical advantage-
• speed of movement is quicker
• better range of movement at joint
• the effort arm is closer to fulcrum than load.
◦ the joint is closer to the muscle so movement
is faster
mechanical disadvantage
• requires a lot of force to move heavier loads
• struggles to lift heavy loads
