T2: Movement analysis

• What is a lever?

  A lever is a rigid structure that rotates around an axis and consists of three components: effort, fulcrum, and load.
• What is a fulcrum in a lever system?

  A fulcrum is the point around which the lever rotates, typically a joint in the body.
• What is a load in the context of a lever?

  A load is the force that is applied by the lever system, such as a weight, an arm, or a leg that you want to move.
• What is effort in a lever system?

  An effort is the force applied by the user of the lever system, supplied by the muscles.
• What are the three classes of levers?

  • First class
  • Second class
  • Third class
• In a first class lever, what is the order of the components?

  The order of components in a first class lever is Effort-Fulcrum-Load (E-F-L).
• In a second class lever, what is the order of the components?

  The order of components in a second class lever is Load-Effort-Fulcrum (L-E-F).
• In a third class lever, what is the order of the components?

  The order of components in a third class lever is Effort-Load-Fulcrum (E-L-F).
• What is important to remember about the components of levers?

  It is important to remember which component is in the middle of the lever system.
• What mnemonic can help remember the classes of levers?

  The mnemonic "Flees like exercise" can help remember the classes of levers.
• What type of lever is described as a first class lever?

  A first class lever has the fulcrum located between the load and the effort.
• What is the term used to describe the weight or resistance in a lever system?

  Load
• What is the term used to describe the weight or resistance in a lever system again?

  Load
• What is the best example of a first class lever?

  The neck is the best example of a first class lever.
• What is the term used to describe the force applied to a lever system?

  Effort
• What type of lever is described as a second class lever?

  A second class lever has the load located between the fulcrum and the effort.
• What type of lever is described as a third class lever?

  A third class lever has the effort located between the load and the fulcrum.
• What is the term used to describe the pivot point in a lever system?

  Fulcrum
• What is the term used to describe the force applied to a lever system again?

  Effort
• What is the best example of a second class lever?

  A calf raise is the best example of a second class lever.
• How does the arm movement during a javelin throw exemplify a first class lever?

  The elbow acts as the fulcrum while the biceps and triceps provide the effort to lift the load of the javelin.
• What is the fulcrum in the javelin throw example?

  The elbow is the fulcrum in the javelin throw example.
• What muscles supply the effort in the javelin throw?

  The biceps and triceps supply the effort in the javelin throw.
• What is the load in the javelin throw example?

  The javelin is the load in the javelin throw example.
• What is the best example of a third class lever?

  A bicep curl is the best example of a third class lever.
• In a third class lever, how does the effort compare to the load?

  The effort is always greater than the load in a third class lever.
• What is the effort arm in a lever system?

  The effort arm is the distance from the effort to the fulcrum.
• What is the fulcrum in a lever system?

  The fulcrum is the pivot point in a lever system.
• What is the concept of mechanical advantage?

  It allows a large load to be moved with a relatively small amount of effort.
• When does a lever have mechanical advantage?

  When its effort arm is longer than its load arm.
• What is the load force to effort ratio in levers with mechanical advantage?

  They have a high load force to effort ratio.
• Why can't third class levers lift heavy loads with the same effort as second class levers?

  Due to the position of the fulcrum in relation to the effort and load.
• What indicates that a lever is at a mechanical disadvantage?

  When its load arm is longer than its effort arm.
• What is true about second class levers?

  They always have a mechanical advantage.
• What is a sporting example of a second class lever?

  Long jump taking off.
• Why is the force produced by the muscle relatively small in a long jump take-off?

  Because the effort arm is longer than the load arm.
• What is true about third class levers?

  They always have a mechanical disadvantage.
• What should a performer do to generate the most force when bowling in cricket?

  Extend their arm fully.
• How does the length of the load arm affect speed in third class levers?

  The longer the load arm, the greater the speed.
• What indicates mechanical advantage in levers?

  When the effort arm is longer than the load arm.