Lever Systems of The Body by Teach Simple

About this resource

What's inside this resource

Lever systems in the human body are explained across a 29-slide UK GCSE PE presentation branded 'Movement Analysis' from ThePeTutor.com, covering the three components of a lever (fulcrum, effort, and load/resistance) and how they combine into first-, second-, and third-class lever systems. Diagrams and worked examples connect each lever class to a real body movement, such as elbow extension as a first-class lever and plantar flexion during a jump as a second-class lever, and later slides teach how to calculate mechanical advantage as the ratio of effort arm to resistance arm. Six numbered activities are referenced throughout the slides, such as 'complete activity 1 by completing the definitions' and 'complete activity 5 by calculating the mechanical advantages,' but no accompanying worksheet file is present among the product's components, so those activities cannot be completed from this file alone. The presentation closes by repeating its three tiered learning objectives, moving from knowing lever components through labelling lever diagrams to applying lever systems to sporting movements.

In the classroom

Teaching tips & learning objectives

Learning objectives

Identify the three components of a lever system: fulcrum, effort, and load/resistance.
Classify first-, second-, and third-class levers and label linear diagrams of each.
Calculate mechanical advantage as the ratio of effort arm to resistance arm.
Apply lever classification to specific body movements and sporting actions.

Teaching tips

Because the presentation repeatedly references 'the worksheet' for six numbered activities that are not included in this file, prepare or source a companion worksheet before teaching the lesson.
Use the body-movement examples (elbow extension, plantar flexion, elbow flexion) to connect each lever class to a movement students can physically demonstrate in class.
Revisit the three tiered learning objectives at the end of the lesson as a self-assessment check, since the slides repeat them verbatim as a closing summary.

Skills covered

Lever system classification - students identify first-, second-, and third-class levers from diagrams and label the fulcrum, effort, and resistance in each.
Mechanical advantage calculation - students compute the ratio of effort arm to resistance arm to determine whether a lever system has a mechanical advantage.
Applied movement analysis - students connect lever classifications to specific body movements, such as elbow flexion and plantar flexion, in sporting contexts.

Good to know

Questions teachers ask about this resource

How does the presentation connect lever classification to actual sporting movements?

It walks through worked examples such as elbow extension (a first-class lever, tricep pulling the radius) and plantar flexion during a jump (a second-class lever, gastrocnemius pulling the heel), identifying the bone as the lever, the joint as the fulcrum, and the muscle as the effort in each case.