Checkpoint task - Worksheet 1
Biomechanics: Lever systems
Instructions and answers for teachers
These instructions cover the student activity section which starts on page 8. This Checkpoint task
should be used in conjunction with the KS4–5 Physical Education Transition Guide: Biomechanics,
which supports OCR A Level Physical Education.
When distributing the activity section to the students either as a printed copy or as a Word
file you will need to remove the teacher instructions section.
123 – This activity offers an opportunity
for maths skills development.
ABC – This activity offers an opportunity
for English skills development.
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Checkpoint task - worksheet 1: Lever Systems – Answers
1. Identify the class of lever and give a sporting example of each.
Lever
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Lever class
Example from sport
1st class
Pulling the head back –
extensions at the neck.
2nd class
At the elbow when doing a
bicep curl.
3rd class
At the ankle when taking off
to high jump.
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2. Define mechanical advantage?
This is when the effort arm is longer than the load arm, allowing the lever system to move a large
load over a short distance with little effort.
3. Explain using a practical example what mechanical example is?
When jumping the ankle is under mechanical advantage as it can lift the heavy load of the human
body but only over a small distance (from the ground) with minimum effort.
Checkpoint task - worksheet 2: Planes and Axes of rotation (Answers)
1. For the pictures below draw on the plane of movement for the skill being performed.
a) Footballer striking a ball –
Sagittal
b) Tennis player serving in tennis –
transverse
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c) Gymnast cartwheeling – frontal
d) Trampolinist somersaulting –
transverse
e) Cyclist – transverse
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2. Identify the axis of rotation being used
a) Gymnast somersaulting – transverse
b) Ice skater spinning –- longitudinal
c) Gymnast cartwheeling – frontal
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d) Table tennis player performing topspin
(at shoulder) – longitudinal
e) Leg action of a sprinter (at hip) –
transverse
3. How can an athlete increase the velocity of their rotation? Use the example of an ice skater
spinning to help you.
By tucking arms and legs in tight close to the middle of their body, the skater will spin more
quickly.
4. How can an athlete decrease the velocity of their rotation?- use the example of a high diver
to help you.
When diving they enter the water in a straight position this slows down the spinning and allows
them to enter the water safely as it gives them more time.
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Extension task
You are a biomechanical analyst and for a skill of your choice need to create a storyboard or video
explaining the skill. It should include:



The class of lever being used
The plane of movements that the action passes through
For the major joint being used the axis of rotation.
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Checkpoint Task
Checkpoint Task Worksheet 1: Lever Systems
Student Activity
1. Identify the class of lever and give a sporting example of each.
Lever
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Lever class
8
Example from sport
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2. Define mechanical advantage?
3. Explain using a practical example what mechanical example is?
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Checkpoint Task Worksheet 2:
Planes and Axes of rotation
5. For the pictures below draw on the plane of movement for the skill be performed.
a)
b)
c)
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d)
e)
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6. Identify the axis of rotation being used
a)
b)
c)
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d)
e)
7. How can an athlete increase the velocity of their rotation? Use the example of an ice skater
spinning to help you.
8. How can an athlete decrease the velocity of their rotation?- use the example of a high diver
to help you.
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Extension task
You are a biomechanical analyst and for a skill of your choice need to create a storyboard or video
explaining the skill. It should include:

The class of lever being used

The plane of movements that the action passes through

For the major joint being used the axis of rotation.
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