Download Chapter 2 Sample questions with mark schemes

2 Basic concepts of biomechanics
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AS PE for OCR Teacher Resource File 2nd Edition
Sample questions with mark schemes
SAMPLE QUESTIONS
(a)
Figure 1 shows a sprinter in the “on your marks” position.
Figure 1
Using your knowledge of Newton’s Laws of Motion, explain how the sprinter is able to
accelerate away from the blocks at the start of the race.
[6 marks]
(b)
General motion is most commonly observed in sports performers. Identify the other two
types of motions that can be observed in sports performance and use your knowledge of
force to explain how each type of motion is generated, giving examples from sport where
appropriate.
[4 marks]
MARK SCHEME
(a)
Using your knowledge of Newton’s Laws of Motion, explain how the sprinter is able to
accelerate away from the blocks at the start of the race.
[6 marks]
6 marks for 6 of:
1. Newton’s first law is the law of inertia
2. a body will remain at rest or travelling with uniform velocity unless acted on by an
external force
3. in order for the sprinter to leave the blocks, they must apply an external force
© Owned by or under licence to Pearson Publishing Oxford Limited 2008
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2 Basic concepts of biomechanics
AS PE for OCR Teacher Resource File 2nd Edition
4. Newton’s second law is the law of acceleration
5. the acceleration of a body is proportional to the force causing it and takes place in the
direction in which the force acts
6. the greater the force generated by the sprinter on the blocks / track surface, the
greater their acceleration
7. Newton’s third law is the law of reaction
8. for every action there is an equal and opposite reaction
9. the sprinter applies a downward and backward force on the blocks
10. the blocks apply an equal and opposite / upward and forward force on the sprinter
(b)
General motion is most commonly observed in sports performers.
Describe the other two types of motions that can be observed in sports performance
and use your knowledge of force to explain how each type of motion is generated,
giving examples from sport where appropriate.
[6 marks]
6 marks for 6 of:
1. linear motion
2. occurs when a body moves in a straight or curved line, with all its parts
moving
the same distance at the same speed
3. it is generated by a direct force
4. a force that travels through a body’s centre of mass
5. e.g. luge , shot put, vertical jump, bobsleigh etc
6. angular motion
7. occurs when a body or part of a body moves in a circle or part of a circle about
the axis of rotation
8. it is generated by an eccentric force
9. a force that travels outside the body’s centre of mass
10. the further the force acts from the centre of mass, the greater the rotational effect
11. e.g. arm action around should joint in cricket bowling, giant circle on high bar in men’s
gymnastics etc
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