2.1.3 Third-class levers

• What is the fulcrum in a bicep curl example of a third-class lever?

  Elbow joint
• What is a common disadvantage of using third-class levers?

  Requires more effort
• Third-class levers provide high speed and a large range of movement
• What is a disadvantage of second-class levers?

  Limited range of motion
• Third-class levers require more effort to lift the load compared to other lever classes.


  True
• Why is more force needed in third-class levers compared to other lever classes?

  Higher effort required
• What type of effort is required in third-class levers?

  More effort
• Arrange the following lever classes in order of their mechanical advantage from highest to lowest:

  1️⃣ Second-class

  2️⃣ First-class

  3️⃣ Third-class
• The effort in a third-class lever allows for quick and wide movements
• Where is the effort located in a third-class lever relative to the fulcrum and load?

  Between fulcrum and load
• Third-class levers provide high speed and a large range of movement
• Third-class levers require more effort but provide high speed and a large range of motion.

  True
• In a bicep curl, the fulcrum is the elbow joint.


  True
• A third-class lever is one where the effort is located between the fulcrum and the load.
• In a third-class lever, the effort is between the fulcrum and the load.
• What is the location of the fulcrum in a third-class lever?

  Between effort and load
• Third-class levers provide high speed and range of motion but have a mechanical disadvantage
• Why do third-class levers have a mechanical disadvantage?

  Effort between fulcrum and load
• What muscle provides the effort in ankle dorsiflexion, an example of a third-class lever?

  Tibialis anterior
• Third-class levers are commonly used in movements requiring high power and mechanical advantage.

  False
• What is a third-class lever defined as?

  Effort between fulcrum and load
• First-class levers are used for balance, speed, and power.


  True
• In a bicep curl, which joint acts as the fulcrum?

  Elbow joint
• Third-class levers provide high speed and a large range of motion due to the effort being applied between the fulcrum and the load.


  True
• The effort in a third-class lever is located between the fulcrum and the load.


  True
• Which muscle supplies the effort in a bicep curl example of a third-class lever?

  Bicep muscle
• Third-class levers require more effort to lift the load compared to other lever classes.
• Third-class levers provide high speed and range of motion but have a mechanical disadvantage.


  True
• The effort in a third-class lever is always between the fulcrum and the load.


  True
• Third-class levers provide high speed and a large range of movement.

  True
• Third-class levers require more effort but provide high speed and range of motion.


  True
• Third-class levers require less effort to lift a load compared to other lever classes.

  False
• What is an example of a third-class lever in the human body?

  Bicep curl
• Order the lever classes from highest effort distance to lowest:

  1️⃣ Third-class

  2️⃣ First-class

  3️⃣ Second-class
• Third-class levers provide high speed and range of motion but require more effort
• A common example of a third-class lever in the human body is the bicep
• Match the lever class with its effort location and advantage:

  First-class lever ↔️ Between fulcrum and load ||| Balance, speed, power

  Second-class lever ↔️ Between fulcrum and effort ||| High power, mechanical advantage

  Third-class lever ↔️ Between fulcrum and load ||| High speed, range of motion
• Third-class levers require more effort to lift the load compared to other lever classes.
• Match the lever class with its effort location and advantage:

  First-class lever ↔️ Between fulcrum and load ||| Balance, speed, power

  Second-class lever ↔️ Between fulcrum and effort ||| High power, mechanical advantage

  Third-class lever ↔️ Between fulcrum and load ||| High speed, range of motion
• A common example of a third-class lever in the human body is the bicep