# GCSE - Physical Education - Chp 5 - Anatomy and Physiology - Simple Biomechanics

Chp 5 - Simple Biomechanics

Anatomy and Physiology

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Slide 1: Tekstslide
Physical educationSecondary Education

In deze les zitten 27 slides, met interactieve quizzen, tekstslides en 4 videos.

Lesduur is: 60 min

## Onderdelen in deze les

Chp 5 - Simple Biomechanics

Anatomy and Physiology

#### Slide 1 -Tekstslide

Learning objectives

1) Identify what is meant by force.

2) Understand and apply the equation involving force, mass and acceleration.

3) Describe the effects force has on aspects of sports performance.

#### Slide 2 -Tekstslide

What you need to know..

'Specification'

https://www.cambridgeinternational.org/Images/555751-2022-2024-syllabus.pdf

#### Slide 3 -Tekstslide

What comes to mind when you think of the term 'Force'?

#### Slide 4 -Woordweb

Definition..
A force is, “a push or a pulling action applied upon an object. Measured in Newtons (N)”
Definition means we must know it off by heart for your exam.
Issac Newton

#### Slide 5 -Tekstslide

How can forces be applied within sport?
Force can be applied in large quantities:
A rugby player making a tackle
A sprinter driving out of the blocks

Force can be used in a more controlled way:
A golfer playing a chip onto the green
A badminton player playing a delicate drop-shot

Force can be a push or a pull:
Pushing against the opposition when scrummaging in rugby
Pulling the oars when rowing

#### Slide 6 -Tekstslide

Newtons first law of motion.
A body continues in a state of rest or uniform velocity unless acted upon by an external or unbalanced force.
The law of inertia

#### Slide 7 -Tekstslide

Inertia – “The resistance of an object to changes in motion”

According to the law of inertia, force is required to cause:

1. A stationary object / body to move
2. A moving object / body to change direction, accelerate or decelerate
3. An object / body to change shape

#### Slide 9 -Video

A force can cause a stationary object to move
A force can cause a moving object to change direction

A force can cause a moving object to accelerate

A force can cause a moving object to decelerate

A force can cause an object to change shape

#### Slide 11 -Tekstslide

Task – provide examples from a sport of your choice to explain each effect of force

#### Slide 12 -Open vraag

Newton’s second law of motion

“When a force acts on an object, the rate of change of momentum experienced by the object is proportional to the size of the force and takes place in the direction in which the force acts.”

The law of acceleration

#### Slide 13 -Tekstslide

The law of acceleration can be explained by the formula –
force (N) = mass (kg) x acceleration (m/s2)

• The greater the force applied, the greater the acceleration
• The greater the mass, the slower the object / body accelerates

F = MA

Mass – “The quantity of matter in a body (kg)”
Acceleration – “The rate at which an object changes speed (m/s2)”

#### Slide 15 -Video

Exam style questions...

#### Slide 16 -Tekstslide

A ball is kicked and accelerates at 10m/s2, it has a mass of 0.5kg. How much force is applied to the ball?

#### Slide 17 -Open vraag

A sprinter weighing 90kg accelerates out of the blocks at 3m/s2. How much force does the sprinter apply against the starting blocks?

#### Slide 18 -Open vraag

A tennis ball with a mass of 0.1kg is hit with a force of 200N. How quickly does the ball accelerate?

#### Slide 19 -Open vraag

What happens to the body or object if applied force is reduced? (e.g. a 400m runner begins to fatigue on the final straight)

#### Slide 20 -Open vraag

Newton’s third law of motion

"For every action, there is an equal and opposite reaction."
The law of action and reaction

#### Slide 22 -Video

When a sprinter drives out of the blocks at the start of a race -
Their muscles exert a force of 200N against the starting blocks (downwards and backwards)

The starting blocks exert an equal force of 200N in the opposite direction to the force applied by the sprinter (upwards and forwards)

This reaction force propels the sprinter from the blocks

#### Slide 23 -Tekstslide

If the sprinter has a mass of 80kg, how fast to they accelerate from the starting blocks?

#### Slide 24 -Open vraag

Summary extension questions..
1) State the equation used to calculate force
2) If a sprinter increases the force they apply to the track, what will increase?
3) Provide an example of a push and a pull force in sport
4) A footballer kicks a football weighing 1kg with a force of 25N. Calculate the acceleration of the ball
5) A tennis ball weighing 0.1kg accelerates at 400m/s2 when served. How much force was applied to the ball?
6) Define Newtons third law of motion.

#### Slide 25 -Tekstslide

Topic summary definitions.
A force - “a push or a pulling action applied upon an object. Measured in Newtons (N)”

First law of motion -  "A body continues in a state of rest or uniform velocity unless acted upon by an external or unbalanced force."

Inertia – “The resistance of an object to changes in motion”

Second law of motion - “When a force acts on an object, the rate of change of momentum experienced by the object is proportional to the size of the force and takes place in the direction in which the force acts.”

Third law of motion - "For every action, there is an equal and opposite reaction."